Stuff You Should Know

Stuff You Should Know is a bi-weekly podcast about the stuff you should know. Simple as that.


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March 23, 2017

If you’re out there, Elon Musk, this one’s for you (although you already everything in this episode). Everybody else, buckle in and sit back for a 700 mph thrill ride from LA to SF in 35 minutes – coming soon!

March 21, 2017

In our continuing exploration of crime and punishment, we take a look at the practice of solitary confinement. To be sure, it has its place in prisons, sometimes for protection of the inmates themselves. However, leaving people in solitary for weeks, months and even years is another thing. We explore this cruel and unusual punishment in today’s episode.

March 16, 2017

There was a time when the lower classes of the American South were considered lazy and dimwitted, a stereotype that still somewhat survives today. But this stereotype was rooted in fact. Hookworms, it turns out, were sapping Southerners’ life force.

March 14, 2017

Pain is subjective; it is whatever the person experiencing it says it is. But to effectively treat pain, it helps to quantify it, which is why medicine came up with pain scales.

March 9, 2017

In the second of two parts, what was once a voluntary resettlement program becomes a violent, forced relocation under the leadership of President Andrew Jackson.

March 7, 2017

In this first of two episodes on the Trail of Tears, learn about the forces that converged to create the series of events that formed the basis of what may be the most brutal decade in American history.

March 2, 2017

Now you see it, now you don’t — optical illusions can fool us into seeing what’s not actually there. But what causes that disconnect between perception and reality? Learn all about this visual trickery in today’s episode.

February 28, 2017

Freedom of speech and the press are values vital to American democracy. But the First Amendment doesn’t really define free speech, and plenty of expressions are restricted. Learn all about the ins and outs of this cherished right in today’s episode.

February 23, 2017

It’s common knowledge that famines are usually caused by major droughts: Rain doesn’t fall, crops don’t grow, and people go hungry. But recent research suggests that while weather may trigger famines, they may actually be more of a human-made catastrophe.

February 21, 2017

The estate tax, also known as the death tax, is not new. It’s actually been around in some form since ancient Rome. Some say it’s a necessary tax to help prevent resting on your inheritance laurels. Others say it’s straight up double tax robbery. Learn all about this controversial tax today.

February 16, 2017

The Black Panther Party was a complex political movement that was unfairly painted as a militant group who hated white people. Far from it, they were actually men and women trying to affect change in their community. Their history is one of the more interesting American stories, from the early stages of policing the police to their community service efforts to their inevitable fall. Learn all about the Black Panther Party right now…

February 14, 2017

You can burn them, freeze them, shoot them into space – they wouldn’t bat an eyelash, even if they had eyelashes. Go into the microcosmos and learn about the tiny animals that are so astoundingly durable, they can survive conditions not found here on Earth.

February 9, 2017

In this show recorded live on January 5, 2017 at San Francisco’s Castro Theatre, Josh and Chuck delve into the history and the heyday of the church of consumerism and what it means for local communities and our capitalist society at large when malls die.

February 7, 2017

Quinoa is a trendy food, right alongside kale and anything else farm to table. But it’s really an ancient grain. Although it’s not exactly a grain at all. Technically it’s a pseudo-cereal. But it is tasty and nutritious, a true superfood. Learn all about the food with the funny name in today’s episode.

February 2, 2017

In the not too distant future, sex may not involve being in the same room as your partner. In fact, your partner may not even have to be a human. We’re talking virtual sex here. Couple VR with high tech, smart sex toys and intercourse as we know it may be a thing of the past. Except not really.

January 31, 2017

You could be forgiven for thinking the story behind elastics was boring. You’d still be wrong, though. The story of what’s holding up your underwear is a global drama, replete with war, industrial espionage, colonialism, destitute inventors – everything!

January 26, 2017

There is deep disagreement over whether humans are essentially peaceful or essentially warlike. Depending on your view you may see pacifism as either hopelessly naïve or the unsung response to conflict that’s kept us from wiping ourselves out.

January 24, 2017

There are many types of dictators, from so called ‘benevolent’ ones to the kind who rule with an iron fist. There are also many ways they can come into power, and they don’t all include violence. Learn all about dictators past and present in today’s episode.

January 19, 2017

Soylent is a meal replacement drink, but not really. So what is it? Total sustenance in a glass? Some say so. Is it made from humans? No, that’s just a movie. Learn all about this odd concoction in today’s episode.

January 17, 2017

Artificial sweeteners have gotten a bad rap in the press for as long as they’ve been in use. But is it just the result of a fear of science or do artificial sweeteners cause real harm? A mounting body of studies is starting to paint a pretty grim picture.

January 12, 2017

Unless you happen to be standing on a hilltop or swimming in the ocean right now, you are on a watershed. These unsung wonders of topography and hydrology are an important contributor to the rain cycle and yet we humans tend to abuse them.

January 10, 2017

Baby Boomers are probably the most talked about generation in American history. But who are these people and how did they help shape the country we know today? Find out all about the big boom in today’s episode.

January 5, 2017

The decision to bottle feed a baby instead of breast-feeding is a weighty one these days, fraught with supposed developmental pitfalls and very real social implications. But is bottle feeding a bad thing? And are benefits of breast-feeding overestimated?

January 3, 2017

Breast milk is considered a perfect food for infants, so much so that for the first four to six months of life, a baby can subsist on mother’s milk alone. Learn all about the most fascinating milk around and the science behind it in this episode.

December 29, 2016

Human blockheads are performers who hammer nails and things into their noses. Yup. That’s a thing. And it isn’t a trick either – anyone can do it. Just please don’t try to.

December 27, 2016

Seems like it would be nearly impossible to live without a bank account these days. But it is possible! Learn all about banking and personal finance in today’s riveting episode.

December 15, 2016

Despite our lengthy history of evacuating our bowels and bladders, it wasn’t until the relatively recent 1940s that we began to construct portable, self-contained toilets to accept our waste. Dive into the world of porta-potties in this episode.

December 13, 2016

In 1960 physicist Freeman Dyson suggested that in the hunt for alien life, we should search for evidence of massive engineering projects that encapsulate stars with solar arrays to harness their energy. Could we humans ever make one ourselves?

December 8, 2016

Computer addiction is really an umbrella term for the various addictions that can come along with the computer. We’re talking video games, porn, gambling and the like. We dive deep into the world of digital addiction in today’s episode.

December 6, 2016

A lot of people read their daily horoscopes, but does anyone really take stock in them? Turns out the answer is yes, even though there is no evidence of their accuracy. Learn all about horoscopes today.

December 1, 2016

If you’ve ever seen a flea circus, then count yourself among the few. It’s a dying art, but back in the day they thrilled and delighted young and old alike. Learn all about the tiny big tops in today’s episode.

November 29, 2016

Up to the 1950s most reports of frostbite came from the world’s militaries, but as outdoor sports have gotten more popular, so have frostbite cases. Learn about how frostbite wreaks havoc on your extremities, even literally freezing off your tookus.

November 24, 2016

As kids’ buying power in America has exploded in recent decades, so too has the amount companies spend advertising to them. But because of a quirk of brain development, kids aren’t equipped to understand ads are manipulating them. Should they be banned?

November 22, 2016

Most people have heard of the story of Kitty Genovese. She was murdered near her apartment in 1964 and her neighbors didn’t do much to help. It caused a nationwide outcry, but the story has often been misrepresented. We’ll set the record straight.

November 17, 2016

Concussions are bad enough for football players, but research has found all of those smaller hits can add up to massive brain trauma later in life too, leading to a condition called chronic traumatic encephalopathy, a condition the NFL sought to cover up.

November 15, 2016

They are dirty, harmful to your health, bad for the environment and utterly charming. Wood-burning fireplaces have been with us for centuries and, despite their many drawbacks, are sticking around. Learn more than you thought possible about the fireplace.

November 10, 2016

Things get awesome when Josh and Chuck do a live show on Monty Python at the LA Podcast Festival. Hang out as the duo dives into the ‘Beatles of Comedy,’ what made them tick, what made them so funny, the whole bit. Plus, Kevin Pollak crashes the stage.

November 8, 2016

Taxing things like alcohol, tobacco and gambling is big money and has been for a long time. But are these ‘sin taxes’ keeping people from indulging or are they simply a way to raise revenue? Learn all about sin taxes in today’s episode.

November 3, 2016

Action figures have a long and glorious history. From GI Joes to Star Wars figures, these offshoots of dolls came along at just the right time to capture the hearts and minds of children everywhere. Learn all about the partial history of action figures right here.

November 1, 2016

If you thought that Ham Radio enthusiasts were (mostly) men and boys who sit alone late at night in order to scan frequencies searching for a human connection then you’re absolutely correct. But it’s much more than that.

October 27, 2016

In 1922, a little farm in the woods of Bavaria became the site of what would become Germany’s most famous unsolved murder, when six people were brutally killed with a pick axe. What led up to it and followed is nothing short of bizarre.

October 20, 2016

Chairman Mao’s paranoia of a Soviet invasion led to hundreds of thousands of Beijing residents put to work for a decade building an 85-square-km underground city to serve as a massive bomb shelter. Instead it’s illegal underground housing today.

October 18, 2016

Fish fraud, misrepresenting a fish as a more expensive one, costs Americans $25 billion a year. And because less than 100 inspectors check for fraud in the US and everyone from wholesalers to sushi restaurants are free to rip off their customers.

October 13, 2016

Counting humans has been happening for a long, long time. It usually had to do with taxing them, but now census data can reveal a lot about a population and help satisfy its needs. Count us in for this episode.

October 11, 2016

When animals are faced with scarce food in the winter, they have two choices to stay alive: migrate or hibernate. For hibernators, their bodies undergo some mind-boggling physiological changes in the coldest months. Could humans ever do it too?

October 6, 2016

When the first Europeans landed on Rapa Nui, which they renamed Easter Island, they were puzzled by what happened there. Only a few thousand people lived there but there were signs of a massive civilization that once flourished. What happened there?

October 3, 2016

The soda we get instantly mixed at a fast-food joint owes a lot to a rich history going back to the Roman baths, that features drugs, diseases and explosions. Learn all about soda and soda fountains in this surprisingly interesting episode.

September 29, 2016

Polar bears are more than just lovable creatures that roam the ice in search of food. They’re one of the most fascinating animals on planet Earth. Sadly, as ice shrinks, so does their habitat. Learn all about these huggable beasts in today’s episode.

September 27, 2016

Believe it or not, we live in an ice age. The polar glaciers give it away. Those glaciers used to come clear down to New York. We now know the traces they left are everywhere if you know what to look for; it just took some Swiss peasants to figure it out.

September 22, 2016

Zika is all over the news these days, yet in America, people don’t seem to be too concerned just yet. Some say it’s a case of the media crying wolf. Others say it’s because the risk factors for zika are limited. Learn all about the latest virus to take center stage in today’s episode.

September 15, 2016

The Strad violin is noted for it tonal qualities and superior craftsmanship. And for its price tag. There are many theories why the Strad sounds so great, from the wood to the lacquer, to the simple fact that Antonio Stradivari was really good at what he did. Rosin up your bow and take a listen.

September 13, 2016

Alexander Hamilton, the ‘ten dollar founding father,’ is more than the toast of Broadway. In fact, he just may be the most influential American in history. A brash genius, Hamilton wasn’t much of a politician. He was all about policy. Learn all about Hamilton in today’s episode.

September 8, 2016

Animals have had legal protection from unnecessary harm since the 19th century. Yet what harm is necessary is open to interpretation and animals continue to suffer and die for science and commerce. Should they have the right to freedom from humans?

September 6, 2016

The use of animals for commercial and scientific testing is a quietly controversial topic. That we humans have advanced as a species because we use animals as literal and figurative guinea pigs is undeniable. But do we have the right to do that?

September 1, 2016

A decade before the U.S. officially segregated in 1896, baseball banned black players. A decade before the US integrated, baseball broke the color barrier. Between, the Negro Leagues produced some of the finest players to ever take the field.

August 30, 2016

Some people might think that tasting food for a living is the best job in the whole wide world. But think again! The reality is, it can be a tedious, grueling job that destroys your very love of food.

August 25, 2016

Customs may be a pain when you’re traveling, but it’s a necessary instrument the government uses to regulate trade. Your passport please?

August 23, 2016

Jellyfish are among the most adaptable, competitive organisms on the planet. They can grow back into their juvenile stage when resources are scarce, reproduce in massive groups and kill an adult human, among lots of other neat stuff. Learn all about em!

August 23, 2016

Jellyfish are among the most adaptable, competitive organisms on the planet. They can grow back into their juvenile stage when resources are scarce, reproduce in massive groups and kill an adult human, among lots of other neat stuff. Learn all about em!

August 18, 2016

One of the coolest things humans have ever figured out is how to use steam as power. It made the Industrial Revolution possible and even today, 88% of America’s electricity comes from steam turbines.

August 16, 2016

It was only 11,000 years ago that the last true woolly mammoths died out, close enough to the modern age that humans lived alongside them. But were humans the cause of mammoths’ sudden extinction or was climate change to blame?

August 16, 2016

It was only 11,000 years ago that the last true woolly mammoths died out, close enough to the modern age that humans lived alongside them. But were humans the cause of mammoths’ sudden extinction or was climate change to blame?

August 11, 2016

In today’s episode, we cover part two of our Evel Knievel suite. The man, the myth, the legend. Check in and listen to the latter stages of Evel’s career as the world’s most legendary daredevil.

August 9, 2016

Evel Knievel was perhaps the world’s most legendary daredevil. He came along at a time when the world ate up this kind of entertainment, partially in hopes that he crashed. And crash he did. A lot. Learn all about this icon in this special two part episode.

August 4, 2016

Mermaids aren’t real. That much we know. But the history and lore of these magical and sometimes menacing creatures of the sea is pretty interesting stuff. Learn all about these half women/half fish today.

August 1, 2016

Night terrors, an uncommon sleep disorder, happen when the brain doesn’t transition correctly to deep sleep. The result is terrifying, with the sufferer genuinely terrified, swatting at invisible attackers, and screaming for help – all while sound asleep.

July 28, 2016

Exploding head syndrome isn’t nearly as weird as it sounds, and there are no brain parts being damaged. But if you suffer from it, you will definitely be freaked out. The good news is, despite its name, it’s not dangerous at all.

July 26, 2016

Triage is a system that provides immediate attention and categorization for medical emergencies that hopefully will never be a big part of your life. Unless you work in an ER. Learn all about the interesting history and current methods for this life saving system today.

July 21, 2016

When Michael Jackson debuted the moonwalk in 1983 the world was enrapt. The dance goes back farther, to the 1930s, and pops up again in the 50s, before reappearing via mimes and West Coast poppers in the 70s. Follow the circuitous route of an iconic move.

July 19, 2016

Since the age of Descartes, science has put all of its eggs in the basket of determinism, the idea that with accurate enough measurements any aspect of the universe could be predicted. But the universe, it turns out, is not so tidy.

July 14, 2016

The Gettysburg Address is one of the most famous speeches in political history, despite only being a few hundred words long. What was so special about this commemoration? We’ll give you the skinny right here and now.

July 12, 2016

Fortunately, science has very few instances where humans have been exposed to acute radiation poisoning to study for clues to treating radiation sickness. They have found, though, that those few instances have been grave.

July 7, 2016

You may have heard about the Internet of Things and not known what the term meant. It’s basically a collection of object connected to your life and the internet. We’re talking everything from your smart phone to your fitness tracker. Cool stuff, but fraught with privacy issues.

July 5, 2016

People often ask us how we do our research. We’re not going to disclose all of our secrets, but we’ll give you some tips on how to root out the bad studies from the good ones. Learn all about shady studies and reporting right now!

June 30, 2016

People have been burning fires on cliffs as long as other people have used boats, but after the Age of Exploration, lighthouses took their unmistakable form and the great stories of the people who kept the lights around the world began.

June 28, 2016

People used to use deer antlers to beat the minerals out of rock hidden in the earth. Luckily, they got better at it, and now modern mining is a mind-boggling process for efficiently removing stuff we want from inside the planet.

June 23, 2016

Economists love their data because somewhere in the numbers lies the answer to the ills of the country. They also love to frame data in a way people can relate to. Such is the case with the famous “misery index.”

June 21, 2016

It seems like we largely take it for granted these days, but the fact that we have humans living in space is the realization of a scientific dream a century old. Visit the space stations orbiting Earth past, present and future in this episode.

June 16, 2016

There have been many inventions that have advanced filmmaking, but maybe none as important as the steadicam. Invented in the mid-70s, it literally changed the way movie making happened, and made the impossible possible. Learn about the fascinating history behind this amazing technology today.

June 9, 2016

Starting a fire to prevent fire seems counterintuitive, but it makes a lot of sense once you understand it. But controlled burns aren’t just to help prevent forest fires. They’re also a vital part of keeping the local ecosystem healthy and thriving. Learn all about how controlled burns work right here, right now.

June 7, 2016

Motion sickness is the worst and hits about 25 to 40 percent of humans when they ride in cars, boats, or simply watch the wrong 3-D movie. Join us as we break down the science behind this nausea-inducing affliction.

June 2, 2016

With the discovery of a surprising immune response in E coli bacteria, we are facing a new era of freedom from genetic mutations that lead to disease by simply and precisely editing our genes. But there is also a potential dark side to gene editing.

May 31, 2016

You can thank Wham-O’s SuperBall for inspiring the name of the NFL’s Big Game (buh) and you can thank the fear and the Soviet launch of Sputnik aroused in America for the invention of SuperBall! Learn the history and physics of this bouncy legend.

May 25, 2016

If you’ve ever been in a bad accident in a newer car, you probably have crumple zones to thank for your life. Much more interesting than you think, these zones are designed to break apart and absorb impact, so you don’t have to.

May 23, 2016

Chiggers are tiny little mites capable of making your life miserable. Worse than mosquitoes? Maybe. But they aren’t insects – mites are actually part of the arachnid family and behave a little like ticks. Learn all about these nearly invisible pests in today’s episode.

May 18, 2016

In 1945 a house fire took the lives of five children – except that their bodies were never found. Dive into the longstanding mystery of the odd circumstances surrounding the disappearance of the Sodder children.

May 16, 2016

For thousands of years people have been taking normal trees and forcing them into miniature tableaux of nature, creating living works of art. Learn all about the history and art of this strangely engrossing pastime.

May 11, 2016

Cannibalism is the macabre practice of eating other humans. But sometimes, people have no choice if they want to survive. It’s called survival cannibalism and it tastes like chicken.

May 9, 2016

Snake handling ranges from professional snake milkers for antivenin to religious handlers who tend to get bitten and sometimes die from it. Either way, it can be a dangerous business. Learn all about snake handling right here, right now.

May 5, 2016

In 1943 Swiss chemist Albert Hofman discovered he’d created what may be the most potent hallucinogen known to humankind. Then he took a bike ride. Learn about the chemistry, neurology, history and cultural impact of LSD-25.

May 3, 2016

Between 2 to 20 million years ago, the biggest shark with perhaps the most devastating bite of any animal ever ruled the oceans with an iron jaw. Despite its fierceness, megalodon went extinct while other species that swam with it survive today. Why?

April 28, 2016

America had already used two nuclear bombs to devastating effect when researchers thought “maybe we can used these bombs to dig big holes instead.” That’s right, atom bombs to replace bulldozers. And it worked great.

April 25, 2016

Tornadoes can make mincemeat out of houses, people, cars, you name it. So do you know what to do – and what not to do – when there’s one headed your way?

April 25, 2016

Tornadoes can make mincemeat out of houses, people, cars, you name it. So do you know what to do – and what not to do – when there’s one headed your way?

April 21, 2016

There’s a curious puzzle unanswered by the theory of evolution: why do some animals give up their chance to reproduce to help others reproduce instead? For decades biologists have suggested family was the reason, but that has recently been challenged.

April 19, 2016

The people of Flint, MI were horrified to find their drinking water was poisoned with lead. As we learn more about lead’s effects and realize how persistent it is, the more worrying it becomes. What makes lead so toxic?

April 14, 2016

There are a number of theories for how the universe evolved but none are more widely accepted than the Big Bang theory. Learn about the mind-boggling details of the early universe and hear Dr. Neil deGrasse Tyson talk about what it will take for us to know its origins.

April 14, 2016

There are a number of theories for how the universe evolved but none are more widely accepted than the Big Bang theory. Learn about the mind-boggling details of the early universe and hear Dr. Neil deGrasse Tyson talk about what it will take for us to know its origins.

April 12, 2016

The gender pay gap is the amount of time into the next year a woman must work to earn as much as a man did the previous year. And it’s narrowing at a snail’s pace.

April 7, 2016

Labor strikes are the last resort of a workforce frustrated with low pay or dangerous working conditions. A big part of winning a wage war is having the public in your side. Learn all about strikes in today’s episode.

April 5, 2016

Cats are the most popular pet in the United States, despite the fact that we’ve only been keeping them indoors for 50-60 years. Learn about more cat facts in today’s episode.

March 31, 2016

Nostalgia is a funny thing. It’s not home sickness, it’s more connected to emotions and a time in your life. But is nostalgia worthwhile? Nascent science says it just might be.

March 29, 2016

It was America’s most famous family feud, but the history of the Hatfields vs the McCoys is fraught with bias and inaccuracies. Dig into a disagreement in 19th-century Appalachia that became a very big deal around the world.

March 24, 2016

TED is not a person, it’s an annual conference hosting some of the brightest minds in the world giving talks meant to enlighten and inspire. This episode features TED talker and fellow podcaster Roman Mars of 99% Invisible.

March 24, 2016

TED is not a person, it’s an annual conference hosting some of the brightest minds in the world giving talks meant to enlighten and inspire. This episode features TED talker and fellow podcaster Roman Mars of 99% Invisible.

March 22, 2016

America is named after Amerigo Vespucci, right? Maybe not. And who named Australia? Find out the unusually uncertain origins of the continents and other interesting stuff in this episode.

March 17, 2016

Humans have been wearing makeup for a few thousand years now and yet, here in the US the chemicals used in them are still not understood and not really regulated. Delve into the history of makeup and the psychology and feminist theory around it.

March 15, 2016

Around the world and across time, people have fallen victim to one of the strongest contagions of all – the power of suggestion. Here are just a few examples of these bizarre cases.

March 10, 2016

Since the Supreme Court ruled in 2010 in the Citizens United case that political contributions are speech and should be protected, the floodgates of anonymous political contributions have opened. But does absolute funding corrupt absolutely?

March 8, 2016

Each year hundreds of dogs haul humans in sleds as part of the 1,100 plus mile Iditarod Trail Sled Dog Race. It’s grueling and not without controversy but one thing is for sure, these are some amazing dogs.

March 3, 2016

Not too long ago, people would pay money to gawk and stare at a performer with a physical deformity. They were called freakshows and they began in large part thanks to P.T. Barnum, whose circus we still enjoy today. Sounds awful, but some of these performers became rich folks as a result. Exploitive? You decide.

March 1, 2016

El Nino may mean “the little boy” or “Christ Child” in Spanish, but this weather phenomenon really means crazy things for Planet Earth. We’re talking rain where it’s typically dry and drought where it’s usually wet. Learn why today.

February 23, 2016

Renewable energy could be the key to ensuring the future prosperity and health of Planet Earth and humankind. In this very special episode, we sit down and discuss the possibilities with Bill Gates.

February 18, 2016

For about 175 years people have been huffing nitrous oxide for everything from vision quests to anesthetic to get plain old high. And after all that time we are only now beginning to understand how it works on our brains.

February 16, 2016

It’s likely that without the invention of the pneumatic jackhammer, the Industrial Revolution wouldn’t have hummed along quite so smoothly. Certainly a lot more trains would go around mountains than through them. Learn about this essential tool here.

February 11, 2016

We are going to get down and dirty with all things poop in this episode: What a healthy poop looks like, how to poop your best, the history of using poop to survive in the Canadian wild and lots more interesting stuff.

February 9, 2016

Rabies may have gotten a lot of attention in the U.S. in the 70s and 80s, but it’s still an issue in developing countries. Learn all about this nasty virus in today’s episode. And stay away from raccoons and bats.

February 4, 2016

On Pentacost Island the ritual that preceeded bungee jumping is alive and well. Just why do these tribesmen risk life and limb? To ensure a hearty yam harvest. Great reason.

February 2, 2016

In World War II, a secret department of British ‘corkscrew thinkers’ hatched a plan to use the cadaver of an unclaimed homeless man to turn the tide of the war in the Allies’ favor. It worked.

January 28, 2016

Forty years after a Japanese doctor began using whole body cryotherapy to treat patients with arthritis; the technique has made its ways to med-spas and locker rooms throughout the West. But does it actually do anything?

January 28, 2016

Forty years after a Japanese doctor began using whole body cryotherapy to treat patients with arthritis; the technique has made its ways to med-spas and locker rooms throughout the West. But does it actually do anything?

January 26, 2016

Hippocrates realized that it is even more important to understand the patient than to understand the disease and now, 2000 years later, we are coming back to that way of thinking with personalized medicine.

January 21, 2016

Throughout much of the world, the forests are being managed through sustainable timber harvesting practices. This has come at the cost of much legal battling and a century of practice.

January 19, 2016

There have been a lot of great scientist throughout history, but Sir Isaac Newton might just take the cake. But while he was a certified genius, he was also a little screwy. Dive into the life of this fascinating chap in today’s episode.

January 14, 2016

Caffeine is a heck of a drug – at the same time it’s both good and bad for you. Learn the good, bad and ugly about this everyday stimulant in today’s episode.

January 12, 2016

Science fiction writers have made some amazingly accurate predictions over the years, but in 1945 the pace of technological change created a field that spun off of sci-fi forecasting, futurology.

January 7, 2016

Body language is how you communicate without words. Some say it bears more impact in communication than speaking words. Learn about how you say what you say could mean more than you think.

January 7, 2016

Body language is how you communicate without words. Some say it bears more impact in communication than speaking words. Learn about how you say what you say could mean more than you think.

January 5, 2016

In the late 1980s, the United States experienced a “Satanic Panic,” leading parents to fear for the safety of their children. But were there any real examples of Satanic ritual abuse? Find out this and more in today’s episode.

January 5, 2016

In the late 1980s, the United States experienced a “Satanic Panic,” leading parents to fear for the safety of their children. But were there any real examples of Satanic ritual abuse? Find out this and more in today’s episode.

December 31, 2015

Everybody knows how many whacks Lizzie Borden gave her mother and father with that axe, but there is plenty about the infamous double homicide that remains unresolved, like who actually did it. Travel into the mystery of Lizzie Borden in this episode.

December 29, 2015

The Great Wall of China is one of the most visited tourist destinations in the world. How’d it get built? How old is it? What’s the current condition? Learn this and more in today’s episode.

December 29, 2015

The Great Wall of China is one of the most visited tourist destinations in the world. How’d it get built? How old is it? What’s the current condition? Learn this and more in today’s episode.

December 24, 2015

It’s the most wonderful time of year again! Join Chuck and Josh as they explore Christmas traditions around the world, tidbits about Elf, holiday foods and lots more joyous stuff in this glad tidings-packed episode.

December 24, 2015

It’s the most wonderful time of year again! Join Chuck and Josh as they explore Christmas traditions around the world, tidbits about Elf, holiday foods and lots more joyous stuff in this glad tidings-packed episode.

December 22, 2015

You know what I heard? That Josh and Chuck hate each other and they’re just faking being friends for the show. That’s called gossip, folks and it can do serious damage. Learn all about it in today’s episode.

December 22, 2015

You know what I heard? That Josh and Chuck hate each other and they’re just faking being friends for the show. That’s called gossip, folks and it can do serious damage. Learn all about it in today’s episode.

December 17, 2015

Long ago, in a galaxy not so far away, George Lucas allowed the Star Wars Holiday Special to be made. What happened on the night of November 17, 1978 can never be fully explained, but we make our best effort in a very special edition of SYSK. May the force be with us all.

December 15, 2015

In 1900 sponge divers found the wreck of a 2000 year-old treasure ship that contained within it a machine that should not exist. Learn of the device that reveals an understanding of the cosmos far more sophisticated than anyone knew the Greeks possessed.

December 10, 2015

You have very likely used reverse psychology before, trying to persuade someone to do something you want by suggesting they do the opposite. What’s behind the bizarre reaction this elicits?

December 8, 2015

Carl Sagan was the world’s first mainstream media super scientist, capapble of breaking down complex ideas for the common folk. But what made him tick? Billions and billions of great ideas.

December 3, 2015

In part two of the series on HIV/AIDS, Chuck and Josh explore how the battle against the disease is being fought and won thanks to new treatments and possible cures.

December 1, 2015

AIDS is one of the most well-known and most misunderstood diseases humans are susceptible to. In part one of this two-part series, Josh and Chuck explain how the disease is contracted and how it works.

November 26, 2015

After a year of taking it on the road, Josh and Chuck are releasing their show on public relations. Learn all about the ways you’re manipulated on a daily basis and the man who invented it in this fascinating live episode.

November 24, 2015

Anonymous is an amorphous group of hacktivists with no single leader or power structure. Some call them heroes, others call them criminals. Can they be both?

November 24, 2015

Anonymous is an amorphous group of hacktivists with no single leader or power structure. Some call them heroes, others call them criminals. Can they be both?

November 19, 2015

The number of people suffering from dementia is expected to explode in the coming decades and, in a pleasant surprise, countries around the world are taking steps to plan for the increase in friendly, caring ways.

November 18, 2015

Other comedians cry on the inside, but Rodney Dangerfield built his entire act around his sad life. Get to know this legendary comic who was nearing 50 when he got his break.

November 18, 2015

Other comedians cry on the inside, but Rodney Dangerfield built his entire act around his sad life. Get to know this legendary comic who was nearing 50 when he got his break.

November 17, 2015

Gazing too long upon another person is almost universally viewed as anywhere from impolite to hostile, which is odd considering science isn’t fully certain why we stare – and why we’re so good at knowing when we’re being stared at.

November 12, 2015

Since its re-discovery in the early 20th century, the Medieval codex the Voynich Manuscript has thoroughly puzzled anyone who has tried to unlock its secret language and bizarre drawings. Will it ever give up its secrets?

November 12, 2015

Since its re-discovery in the early 20th century, the Medieval codex the Voynich Manuscript has thoroughly puzzled anyone who has tried to unlock its secret language and bizarre drawings. Will it ever give up its secrets?

November 10, 2015

Cultures around the world over the years have been inspired by, then repulsed, then inspired by maggots’ ability to heal persistent wounds. We are in an inspired-by phase right now.

November 5, 2015

Unless you were raised alone in a basement (in which case you may be the subject of one), you probably grew up on fairy tales. That’s appropriate because they may be humanity’s greatest psychic projection screen.

November 3, 2015

Fairy tales are for kids right? Well not at first they weren’t. They were dark tales of murder, rape, incest, cannibalism and mayhem geared toward adults. What changed? Chuck and Josh will drop that knowledge and more in today’s episode.

October 29, 2015

Each year, Chuck and Josh read a couple of scary stories and this year they have a pair of truly frightful tales about a haunted bog and a terrifying spider exhibit.

October 27, 2015

The concept of passports – that people should enjoy protected freedom of movement – is an ancient one. It wasn’t until WWI that they became universal. Learn all about this overlooked, important document.

October 22, 2015

You’ve heard lots of complaints about vocal fry, mostly from older white men. But it’s not exclusive to the Kardashians. Learn all about vocal fry, upspeak and other quirky speech trends in today’s episode.

October 20, 2015

There is a way to not only sustainably get rid our household waste, but also produce enough energy from it to power the process and even create electricity for the grid. The future is here.

October 15, 2015

Wine fraud may be a case of rich con artists tricking wealthy people into parting with money, but it’s still a crime. Learn all about this weird, widespread practice in today’s episode.

October 13, 2015

Darwin asserted that seemingly useless organs and behaviors are left over from our evolutionary history. But as more are found to have a function, the idea has become a flashpoint for the battle between science and religion.

October 8, 2015

The Philadelphia Experiment is a bad movie from the 1980s, and also the conspiracy theory that refuses to die, despite virtually zero evidence of its occurrence. Learn all about this strange non-event in today’s show.

October 6, 2015

Lobbying is an entrenched part of American politics and one that many people think is breaking government. But petitioning the government is protected in the Constitution. How can this system be fixed?

October 1, 2015

PEZ began in Vienna as a mint meant to help people quit smoking. But once American kids got ahold of it, the candy took off and a symbol of childhood – and healthy secondary market among collectors – was born.

September 24, 2015

Green energy is good for all, and it doesn’t get much greener than using the Earth’s own heat to warm your home or office. Learn all about geothermal energy in today’s new episode.

September 22, 2015

The fear of cults in the 1970s drove Americans to look the other way on kidnappings, abuse and torture of cult members by deprogrammers – but did it even work?

September 22, 2015

The fear of cults in the 1970s drove Americans to look the other way on kidnappings, abuse and torture of cult members by deprogrammers – but did it even work?

September 17, 2015

At the height of the Cold War, a group of concerned scientists promoted their findings on the horrific aftereffects of nuclear war and were accused of fear-mongering. But were they right after all?

September 15, 2015

Some people call them flacks. Other people call them liars. But if you’re in the public eye and suddenly have an image problem, you’ll call them your best friend.

September 10, 2015

Born and raised in South America, chilis were the earliest crop domesticated in the continent and among the first items brought back to Europe by Columbus. Today people are really, really into them.

September 8, 2015

Police dogs have been used since the 19th century – one WWI German defector became a major movie star. But in the US the post-9/11 era has seen a K9 unit boom and questions and concerns have increased as well.

September 3, 2015

In the US, 17 million people are alcoholics. Not merely abusing alcohol, these sufferers become physically dependent on it, forming a chronic disease. Learn about the effects on the body, the brain, and the life of an alcoholic and ways to get help.

September 1, 2015

Donating your whole body to further science and medicine is probably the best thing you could do with your corpse. Which is why the industry that handles those gifts need regulating.

August 27, 2015

Hinduism and Buddhism are closely related in a number of ways, including their vision of what comes after we exit this mortal coil. Learn about the religions’ interesting interpretation of the state of existence outside space-time.   

August 27, 2015

Hinduism and Buddhism are closely related in a number of ways, including their vision of what comes after we exit this mortal coil. Learn about the religions’ interesting interpretation of the state of existence outside space-time.   

August 25, 2015

Arguably the most beautiful objects in the entire world, hot air balloons take advantage of some interesting physics and have a long history of killing their occupants. Find out more.

August 20, 2015

For millennia humans have recognized four tastes, but in the 1980s a fifth taste first isolated in Japan gained worldwide acceptance – and took off like a rocket! Learn about meaty, musty, savory umami in this episode.

August 18, 2015

Pigeons can get a little confusing. Passengers, messengers, carriers, homing – the list goes on. But when it comes down to it, they’re all variations of the same smart bird with a knack for getting home to roost. Learn about these clever creatures in today’s episode.

August 13, 2015

We’ve covered our fair share of pop-culture icons and here is another – Hula-Hoops. They’ve been around since ancient time in some form or another, but made their name in during the Hoop Boom of the 1950s. Learn all about this popular fad and more.

August 13, 2015

We’ve covered our fair share of pop-culture icons and here is another – Hula-Hoops. They’ve been around since ancient time in some form or another, but made their name in during the Hoop Boom of the 1950s. Learn all about this popular fad and more.

August 11, 2015

What began as a challenge to an oil engineer to make a terrible singer into a pitch-perfect one, Auto-Tune has become a ubiquitous (and, to many, obnoxious) part of the musical soundscape.

August 6, 2015

Droughts can be an inevitable feature of a local climate or a catastrophic result of human meddling. In this episode, learn the ins and outs of droughts, including the American mother of them all, the Dust Bowl.

August 4, 2015

Since the Kepler telescope went online, astronomers have found there may be an estimate 40 billion planets like Earth in the Milky Way galaxy alone. What does it take for a planet to be considered Earth-like?

July 30, 2015

They are creepy, sure, but they are also useful, cute and in great danger of extinction. Get a new lease on life with a new view of bats in this episode.

July 28, 2015

At its base, criminal profiling is a legitimate investigatory tool. The Supreme Court has drawn a clear line that bans profiling when it includes race. So why do we still do it?

July 28, 2015

At its base, criminal profiling is a legitimate investigatory tool. The Supreme Court has drawn a clear line that bans profiling when it includes race. So why do we still do it?

July 23, 2015

About half of all people experience rage on a daily basis when they get behind the wheel. What is it about driving that ticks us off so badly?

July 21, 2015

In some states, it is not only your right but your duty to arrest someone you see committing a crime. Learn all about why you should basically never do that in this episode.

July 16, 2015

During World War II, Nazis invaded the United States with saboteurs bent on fomenting chaos. Three times.

July 14, 2015

In 1974, Chinese farmers discovered the first of what would number 7,000 terracotta soldiers meant to protect China’s first emperor in the afterlife.

July 9, 2015

What began as a pair of teens who made a film for their grandparents has exploded into its own art form. Learn all about how stop-motion Lego films are made.

July 7, 2015

Pyramids can be found in ruins around the world, but no civilization perfected the feat of engineering like Pharaonic Egypt. Learn about the mysteries that still surround these giants.

July 2, 2015

Don’t be confused – this one is about actual circus acts made of family members, not the controversial comic strip.

June 30, 2015

Did you know some of our most beloved movies originally had different, sometimes better, endings? That is until they were tested in front of focus groups.

June 25, 2015

Sun Tzu said know your enemy, and so it is in that spirit that we present this episode on one of the worst airborne pests in the world.

June 23, 2015

Well-planned landfills have only recently come into widespread use. Recently, waste managers have found that they work a little too well and now the landfill is being reinvented.

June 16, 2015

You should never BASE Jump. It is one of the most genuinely dangerous sports on the planet. But with that out of the way, you should definitely learn all about this pastime where people jump from tall structures and outcroppings for fun and thrills.

June 11, 2015

From prehistoric logs across streams to the 102-mile Kunshan Grand Bridge, nature works ceaselessly to take down spans. Learn about the fascinating ins and outs of bridge design and building and the mind-boggling challenges structural engineers face.

June 9, 2015

In 1977, Ohio State astronomers discovered a radio transmission from space that was 30 times louder than the cosmic background noise. Since then every explanation of what it was has fallen short and the Wow! Signal remains possible evidence of alien life.

June 4, 2015

It’s easy to overlook the importance of ocean currents – they move along out at sea, while we stay mostly on land. But we are globally affected by them every day. Currents form the base of the food chain, drive weather and keep life as we know it going.

June 2, 2015

The street gang problem in America peaked in the 1990s, but recent FBI reports find that gang membership doubled from 2006-2011. What’s driving this increase, and gangs in general? Wander into gang territory with Josh and Chuck in this episode.

May 28, 2015

Tupperware won immediate design acclaim when it was released in 1947, but it took a pioneering female executive to make a line of plastic food storage into an icon of the American postwar boom. Learn about the surprisingly intriguing history of Tupperware.

May 26, 2015

Junk food is literally that, empty calories of energy that provide little nutritional value and usually are stored as fat. Yet junk food is irresistible and for good reason – companies spend tens of millions engineering it to be that way.

May 21, 2015

Science doesn’t have a good explanation for why we sense color, yet it is everywhere and affecting us all the time. But why should minutely different wavelengths of light have such an impact on our moods and motivations?

May 19, 2015

Some of it seems innocuous enough: protecting kids from unseemly sites or intellectual property from piracy. But the tools to protect these things are the same that governments can also use to censor ideas and quell dissent.

May 14, 2015

Tens of millions of Scouts, and their parents, have taken standard blocks of wood and turned them into cars that zip along at up to 20 mph. Learn about the origin, physics and more of Pinewood Derbies in this episode.

May 12, 2015

The FDA was the first consumer protection agency in the US. Since 1906, it’s been issuing regulations meant to protect Americans from tainted food, ineffective drugs and pacemakers that don’t work. But is the FDA too cozy with industries it regulates?

May 7, 2015

Around ages 9 or 10 a boy will begin to undergo a magical, surprising, weird, amazing, totally bonkers transformation from childhood to adulthood. To separate fact from myth, Chuck and Josh take on the role of gym teachers and wade into male puberty.

May 5, 2015

Physicians noticed centuries ago that people exposed to cold temperatures often have amazing recoveries from serious medical emergencies. Now medicine is learning how to purposefully induce hypothermia in order to buy time to fix otherwise fatal trauma.

April 30, 2015

Spiders are second only to snakes in the dread department, but they’re actually very helpful arachnids who are only deadly to humans under the worst case scenario. Of the more than 40,000 species, very few spiders are even venomous to humans. Learn everything you ever needed to know about these 8-legged wonders in today’s episode.

April 28, 2015

Water slides have been around in one form or another since the Romans. But back then they didn’t know that they had on their hands. With the birth of the waterpark in the 1970s, these rides have only gotten more extreme, leading up to the birth of today’s water coaster. All this and more in today’s episode.

April 23, 2015

If you think snakes are legless reptile carnivores, then you are exactly right. If you think snakes are here to kill you then you are exactly wrong. Learn more about these fascinating and undeservedly condemned animals in today’s podcast episode.

April 21, 2015

Jesters of some sort have been around since ancient Egypt and China. Our modern clown was invented around 1800 and ever since they have been getting steadily creepier.

April 16, 2015

In 1968, Paul Erlich published The Population Bomb, predicting coming famine and mass death. Erlich’s predictions didn’t pan out but his ideas launched a debate still raging today.

April 14, 2015

It has been called a “glorified spring”, but Slinky is one of the best selling toys of all time. From accidental origins to an unlikely resurrection, Slinky has a pretty great back story.

April 9, 2015

Blood types have one of the more interesting backstories in medical history. But as much as we’ve figured out about them and how they work, we still don’t know much about why we even have different blood types. Listen in for a truly fascinating look at your most essential bodily fluid.

April 7, 2015

In this episode of Stuff You Should Know, Josh and Chuck dive into the world of polyamory. Turns out polyamorists aren’t aren’t weirdos and deviants, they’re just regular folks looking for love from more than one person. Learn all you ever needed to know about this unique, but not so modern arrangement.

April 2, 2015

Happy Easter from Stuff You Should Know! Learn all about Easter, from its humble beginnings as a pagan holiday to the multi-billion dollar industry it is today. We’ll cover the Biblical and religious aspects, along with the origins of some of Easter’s greatest traditions.

March 31, 2015

Does the human body really replace itself every few years? The answer is yes, but different parts of the body do so at different rates. Learn all about which parts of your body are the speediest, and which take the longest to regenerate.

March 26, 2015

Why would people want to remove salt from water? To solve the world’s water problem, that’s why. Learn all about the efforts to desalinate H2O in cheaper and more efficient ways.

March 24, 2015

Medical science has a long and storied history of trying out cures and procedures that later strike us as wacky. And they’re still at it today! Learn about bizarre treatments, from opium for children to tobacco smoke enemas in this episode.

March 19, 2015

Despite tons of people using cotton swabs each day to clean the earwax from their ears, cerumen (as earwax is clinically known) is actually quite beneficial to the health of your ears – and even kind of ingenious as your body’s defense goes.

March 17, 2015

The use of general anesthesia is less than 200 years old. Before doctors were able to cause unconsciousness in patients, surgery was brutal for all involved. But despite this advancement in medicine, science still has no idea how it works.

March 12, 2015

Legend has it that tea was discovered by a curious Chinese emperor after leaves blew into his boiled water. Now tea is the second only to water in popularity worldwide. And despite the varieties of tea, they all come from a single species of plant.

March 10, 2015

Fleas are the bane of the existence of pet owners. From their eggs to their lifespan to their feeding habits, fleas are practically designed to be a nuisance. They are parasites, after all. Get down on flea level with Josh and Chuck in this episode.

March 5, 2015

Even as far back as the Roman invaders, people have had absolutely no idea just what the massive monument complex in England known as Stonehenge was built for. Join Josh and Chuck as they try to get to the bottom of this Neolithic mystery.

March 3, 2015

Even though almost half of Americans believe in it, ESP usually is treated as a load of bull by skeptics. But some respected researchers have dared to apply the scientific method to investigate ESP and a few have found some surprising results.

March 3, 2015

Even though almost half of Americans believe in it, ESP usually is treated as a load of bull by skeptics. But some respected researchers have dared to apply the scientific method to investigate ESP and a few have found some surprising results.

February 26, 2015

An estimated 50,000 films were made worldwide in 2009 alone. Many are surely clunkers, but in this episode Chuck and Josh talk about the ones that emerged throughout cinema history to change the course of all movies that followed. Get your popcorn.

February 24, 2015

For at least the last 200,000 years, between 10-15% of the human population are left-handed and this fact has utterly left science baffled. In searching to explain handedness, all sorts of contradictory evidence has emerged, creating a fascinating mystery.

February 19, 2015

Women consistently rate scent as the most important factor in a man’s attractiveness and men have been manipulating that for centuries with scents of all sorts. Learn about the fascinating history — and, well, art — of making perfumes in this episode.

February 17, 2015

Off Nova Scotia, the tiny spit of land called Oak Island has been host to waves of treasure hunters for more than 200 years. Some of them lost their lives in the search for a treasure reputedly buried in a deep pit. But is anything really there?

February 12, 2015

What is folklore? Turns out it’s just about anything you can think of that’s shared by more than two people. Art, literature, stories, dance, music, traditions, even those family heirlooms qualify. Turns out folklore is pretty neat. Learn all about it in today’s episode.

February 10, 2015

Feng Shui is an Asian concept that strives to unlock your chi by how your home or office is arranged. Or at least that’s the simplified “Western” version. It’s a little more complicated than that in reality. We’ll unlock your chi by explaining how feng shui works in today’s episode.

February 5, 2015

We all scream for ice cream, sure, but did you know we’re all technically screaming about a colloidal foam? Prepare for deep cravings that will surely emerge as you learn the history of ice cream, how to make it yourself and lots more.

February 3, 2015

Rainbows seem to defy nature, but they’re really pretty simple when it comes down to it. Turns out it’s just light reacting to water droplets in the air. But they sure do look cool. Learn all about how rainbows are formed in today’s episode.

January 29, 2015

If you’re an American who had a childhood, you probably have some nostalgia for Hot Wheels. Get your engines revved for this trip down memory lane as we discuss these fun and iconic toys.

January 27, 2015

Poison ivy, oak and sumac are all variations of the same plant and they all can make you itch… if you’re susceptible that is. In this episode, you’ll learn just about all there is to know about this itch-causing plant, including how to best avoid it.

January 22, 2015

Nostradamus delighted us all in grade school, but it turns out the real guy wasn’t quite as prescient as we were led to believe. In truth, he wrote a lot of purposefully confusing riddles that people have twisted into meaning exactly what they want them to mean. Learn all about Nostradamus in today’s episode.

January 20, 2015

1963 was a huge year of conflict and progress for the American Civil Rights Movement and the March On Washington was the high water mark of that eventful year. Join Josh and Chuck as they get into the story behind the story we learned in school.

January 15, 2015

There is a lot – A LOT – to juggling and Chuck and Josh go over the lion’s share of it. Delve into the deep history, physics, how-tos and different types of juggling in this surprisingly sweeping look at a putatively innocuous pastime.

January 13, 2015

It evolved over centuries to become the gold standard for conducting scientific inquiry. Yet many people – including some scientists – don’t fully understand it. Learn about the basis of how we explore our world in this episode.

January 8, 2015

Pretty much immediately after the Internet was opened to the world online gambling sites sprang up. Over the last couple decades, U.S. law and online gambling have had an unusual and complicated relationship. Learn the ins and outs of this grey area.

January 6, 2015

We’ve already recorded an episode on The Muppets, but Jim Henson was such a neat guy we delved into him even further. Learn all about the man behind the Muppets who was so much more than just a master puppeteer in this episode.

January 1, 2015

Join Josh and Chuck live from Vancouver as they dive in to the ins and outs of one of the oldest businesses in the world – the bar! Learn about the history of bars, cocktails and the good people who put them together in new and amazing ways.

December 30, 2014

Legends of sea monsters are as old as humanity, and some ancient cultures even credited with with creating the universe. Even today when the sea washes something odd ashore we see monsters – we understand there’s much more than appears above the surface.

December 25, 2014

It’s that time of year again! Time to get cozy and tuck in with Josh and Chuck as they spread glad tidings and warm Christmas cheer. Tune in to hear about Letters to Santa, A Christmas Story, mulled wine and more neat stuff.

December 25, 2014

It’s that time of year again! Time to get cozy and tuck in with Josh and Chuck as they spread glad tidings and warm Christmas cheer. Tune in to hear about Letters to Santa, A Christmas Story, mulled wine and more neat stuff.

December 23, 2014

The GED test was once part of a non-profit organization. That all changed in 2014, when it was privatized, made more expensive and more difficult to pass. But that also brought about a couple of more testing options. Learn all about how high school dropouts can earn their equivalent degree in today’s episode.

December 18, 2014

In another commodities edition of SYSK, Josh and Chuck dive into the world of cinnamon, once the world’s most prized and pricey spice. But did you know it was really just dried up tree bark?

December 16, 2014

The physics behind returning boomerangs literally may be the most difficult concept to understand in the entire body of science. Join Josh and Chuck as they try their absolute best to describe how boomerangs work – and maybe even pull it off!

December 11, 2014

Back in the 1970s, homeschooling was illegal in the U.S., but after activists of all stripes lobbied lawmakers, schooling kids at home has become a viable option for parents. And as more and more have chosen it, it’s become more mainstream.

December 9, 2014

There is a mysterious droning sound often described as like a diesel engine idling that is severely impacting the quality of life of 2 percent of people in places around the world. The thing is, no one knows what’s causing it – or if it actually exists.

December 4, 2014

Like many huge discoveries, X-rays were accidentally stumbled upon. That serendipity led to a medical breakthrough still in use today. Learn about how X-rays are created and why they make such delightful images of our bones.

December 2, 2014

Leprosy, also known as Hansen’s disease, used to mean a one-way ticket to banishment. But once medicine trained its sights on wiping out what might be the most ancient disease to afflict humans, it has become treatable and even accepted.

November 27, 2014

A lot of great thinkers are warning that if humans are to survive as a species we are going to have to find another planet to live on. Terraforming, or engineering a planet to maintain all of the ingredients to sustain life, seems to be the answer.

November 25, 2014

With billions of dollars raised, Kickstarter has singled itself out as the go-to site for creative crowdfunding. But not without some controversy along the way. Learn all about how this artistic business model operates in today’s episode.

November 20, 2014

Throughout the history of the world, there have been many cases of what is known as collective hysteria – groups of people, usually young women, who all exhibit the same physical symptoms of non-existent conditions. Is it psychosomatic? Is it group think?

November 18, 2014

The Enlightenment stands as the moment the West withdrew from superstition and found its faith in reason. Did it shift too far? Learn about this massive shift in thinking which we are still sorting through and coming to understand today.

November 13, 2014

For a while in the 1980s, people were fascinated and confused about what exactly crop circles were. Now we know that they aren’t signs left from aliens, but art made by humans. Learn all about these stunning, large form art installations in today’s episode.

November 11, 2014

What was originally designed to encourage innovation by rewarding the people who create technological advances, the U.S. patent system has become a big mess. Wade into this surprisingly interesting mire to learn how to save this important institution.

November 6, 2014

The first limousines weren’t even cars! Learn all about the history of limousines, how they’re made and some of the most creative and expensive amenities you can find inside them in this episode with Josh and Chuck.

November 4, 2014

The world’s energy consumption is ruining the planet but for decades physicists have been working on what could solve the world’s energy and climate change woes for centuries to come – nuclear fusion. Learn about building stars on Earth in this episode.

October 31, 2014

Get ready to be creeped out and join Chuck and Josh as they read you with two spooky classic horror stories, The Striding Place and The Pale Man in this special bonus Halloween episode.

October 30, 2014

Ever since the Egyptians, humans have been evolving toward haunted house attractions. The level of sophistication in the scares and gore effects continues to rise over time, but the purpose remains the same: to scare the pants off you.

October 28, 2014

The strange disease of fatal familial insomnia was first recorded in the 18th century. Its victims lose their ability to sleep, slip into coma and die.  The more we understand about FFI, the more mysterious it becomes.

October 23, 2014

The wild kingdom is filled with examples of animals that can camouflage themselves into their environment, but the means and the methods are also wildly varied. Learn about the ins and outs of blending in through this episode.

October 21, 2014

Scientists believe that 99% of the estimated 50 billion species that have ever lived on Earth have disappeared through extinction. This is a natural process typically, but it can also be cataclysmic and it’s becoming clear we are amid a massive one.

October 16, 2014

In 1963, 15 men got together in England to pull off one of the most daring heists in history. The Great Train Robbery was the crime of the century, capturing the public’s attention and leaving them torn on who to root for – the cops or the robbers. Learn all about England’s greatest heist in today’s episode.

October 14, 2014

Viruses are big jerks that invade regular cells and hold them hostage, making you sick while they’re doing it. Learn everything you ever needed to know about viruses, including how the common cold works.

October 9, 2014

“Back in the 1920s, skywriting was invented to communicate
with troops, but it quickly found its footing as a popular way for companies to advertise. Learn all about the aerial acrobatics and mental skill it takes to
write mile-high letters backwards.”

October 7, 2014

Karate, meaning “open” and “hand”, was developed in Okinawa before being exported to Japan and then the rest of the world. It is one of the most widely practiced martial arts and one of the most difficult to master. Learn about it in this episode.

October 2, 2014

Almost three percent of Americans suffer from a debilitating disorder that causes them to suffer intense fear seemingly without reason and science hasn’t yet figured out what causes it. Join Josh and Chuck as they get to the bottom of panic attacks.

September 30, 2014

Rogue waves come out of nowhere and tower as much as 100 feet over hapless ships they encounter, breaking across the boat and frequently breaking the boat and its inhabitants. Investigate the mystery of rouge waves in this episode.

September 25, 2014

It’s strange to hear, but the transition from hunting-gathering to agriculture, including the domestication of wild animals, is the single biggest thing to ever happen to humanity. You can thank it for everything from kingdoms to Ebola.

September 23, 2014

Every year, police across the U.S. get thousands of
criminals to confess to their crimes. The trouble is, the procedure that almost
all departments use is grounded in bad science and can produce false
confessions. Learn about ways of making you talk.

September 18, 2014

Even if you entirely eschew the concept of money, we’ll bet you’d be hard pressed not to trade in some form of currency. Learn how everything from cows to cacao beans to tiny shells from Maldives have served as currency at some time or another.

September 16, 2014

In America it’s virtually a dirty word, but after being dragged through the mud for a century, socialism is still a part of the U.S.’s national character. Learn about this foil and complement to capitalism and why it might not be so bad.

September 11, 2014

In some nations royals are so ingrained in the national fabric they are considered part of the country. Join Josh and Chuck as they take a look backward in time at the ancient tradition of despotism and unbridled privilege in this episode.

September 9, 2014

Since scientists realized there is a type of cell that can grow into any other type, they have worked to use them to heal human conditions like Parkinson’s and immune disorders. But because stem cells often come from embryos they remain controversial.

September 4, 2014

Ever wonder why some great shows go off the air after a season or less? Blame it on the Nielsen company, which has for more than 60 years been the almost exclusive decider of what goes and what stays on TV.

September 2, 2014

Pinball was actually illegal until the 1970s in NY and other cities, hidden in the backs of pornography shops. The game was finally legalized, thanks to a Babe Ruth-style shot by the best player in the world. Learn all about it with Josh and Chuck.

August 28, 2014

After newsreels captured the Hindenburg erupting in fire in 1937, the promising development of airship aviation was cut short. Today companies and militaries are taking another look at blimps and the unique qualities that may revive them.

August 26, 2014

Headstones have quite an interesting history. From the beginnings of marking graves with simple wood carvings to the elaborate tombstones that would come in the Victorian era, Chuck and Josh break down the deal with all things headstone in this episode.

August 21, 2014

It’s hard to believe now, but just over 25 years ago there was a giant concrete wall separating East and West Germany. In this episode, Chuck and Josh get into the fascinating story of the Berlin Wall.

August 19, 2014

Elevators are way more interesting than you might think. In this week’s episode, Chuck and Josh board the lift to elighten everyone as to the ins and outs, and ups and downs, of these handy people movers.

August 14, 2014

A disease that was discovered and contained to Central Africa in the 1970s has revived and spread in 2014. Now there is an Ebola outbreak that has moved across borders and science still has no cure for it.

August 12, 2014

Chuck and Josh dive into the secret world of the National Security Agency, from the origins of the snooping outfit, to the recent revelations from whistleblower Edward Snowden.

August 12, 2014

Chuck and Josh dive into the secret world of the National Security Agency, from the origins of the snooping outfit, to the recent revelations from whistleblower Edward Snowden.

August 7, 2014

If you think secretly coded messages sent via short wave radio is Cold War relic, think again. Chuck and Josh are here to dispel that myth, along with many others relating to numbers stations, including why they might still be operational.

August 5, 2014

Do you love Play-Doh? Chuck and Josh certainly love to talk about it, from its interesting history as a wall cleaner, to its more scientific chemical properties. It’s everything you ever wanted to know about the pliable children’s toy.

July 31, 2014

There is a condition that can cause people to feel bugs crawling beneath their skin so acutely that they will use tweezers to pluck them from their eyeballs. It’s a terrible disorder made worse by medicine’s insistence it is all in sufferers’ heads.

July 29, 2014

Josh and Chuck explore the old notion that there’s a dark side of the moon. There is, but it turns out it’s not always the same side. And yes, there’s a side we never see, but it’s not always dark. Make sense? It will in this episode.

July 24, 2014

You can find probiotics – bacteria thought to have healthful
benefits for humans – in everything from pills to yogurt. But does any of it work? Listen as Josh and Chuck get to the bottom of the science (and need for it) of probiotics and health.

July 22, 2014

The concept of trickle-down economics is tied to Ronald
Reagan, but the idea’s been around and in use since the 20s. It’s simple: Give more money to the wealthy and they can use it to rev up an economy. But is the whole thing just a scam?

July 17, 2014

In the U.S. alone, more than 6 million people are affected by infertility and science has taken up the mantle of helping them to conceive. Learn about the clever, though intuitive, methods of assisting infertile couples to have a child.

July 15, 2014

Sushi grew out of a way to ferment fish a couple thousand years ago and in the late 20th century began to take the world by storm. What began as traditional, rigid food has come to evolve with new delicious innovations being added to the original cannon.

July 10, 2014

There’s nothing more boring than watching grass grow, which is why Josh and Chuck aren’t asking you to do that. Instead, you can learn about all sorts of neat things about grass  – like how Americans became obsessed with perfect lawns – in this episode.

July 8, 2014

The idea that the larger the brain, the higher the intelligence is an old one, but it’s pretty much utterly false. Modern investigation into how the brain works suggests there’s a lot more to take into account when comparing brain biology to intellect.

July 3, 2014

Since more than 1 billion people have played it, you’re probably familiar with the board game Monopoly, but we bet you don’t know its secret origins as a left-wing socialist teaching tool. Learn about the history, rules and cultural impact of Monopoly.

July 1, 2014

The most famous museum in the world, France’s Louvre, has been the seat of high art and culture for several centuries. Its history goes back farther than that, beginning in the 1200s as a fort and prison. Tour the Louvre and its collections in this episode.

June 26, 2014


You may be surprised to learn those ubiquitous ratings, from
G to NC-17, put on movies in America are actually handed down by anonymous employees of a secretive organization that serves as a lobbying firm for Hollywood’s six biggest studios.

June 24, 2014


It’s surprising that a few 12-feet-deep pools of asphalt
have proven to be one of the most significant troves of Pleistocene fossils, but the La Brea Tar Pits, located in the heart of Los Angeles, are giving science a clear picture of a puzzling time.

June 19, 2014

Maybe you hail from a soccer crazed country – or from the U.S. Either way, there’s lots to discuss about “the beautiful game”, from its prehistory, rules and strategy to, of course, the World Cup. Join Josh and Chuck as they wade into football, aka soccer.

June 17, 2014

Your employer may be secretly reading your emails, watching what websites you visit and tracking your whereabouts through your phone. And because of how the courts have ruled, there’s nothing you can do about it. Learn all about employer spying here.

June 12, 2014

Since sugar spread from Polynesia a few thousand years ago, the world has been crazy for it. Insanely high prices, wars and even slavery couldn’t undo world’s need for a sugar fix. Today that fix is responsible for the obesity epidemic facing the West.

June 10, 2014

For centuries, doctors have prescribed drugs they knew weren’t real – but that still somehow worked. It wasn’t until the 1980s that the placebo effect, the phenomenon where an inert substance can have a genuine impact on a patient’s recovery, was studied.

June 5, 2014

In the 1950s and 60s, the United States and the Soviet Union battled it out to see who would dominate the race for outer space. The Soviets got out to an early lead, but the U.S. would ultimately win. Learn all about the Space Race in this week’s episode.

June 3, 2014

Venice, Italy has a problem. It’s sinking, and the water around it is rising. Thankfully, some engineers are working hard on the MOSE project – huge gates that keep high tide from happening. Learn all about Venice in this episode.

June 3, 2014

Venice, Italy has a problem. It’s sinking, and the water around it is rising. Thankfully, some engineers are working hard on the MOSE project – huge gates that keep high tide from happening. Learn all about Venice in this episode.

May 29, 2014

If you thought Indiana Jones was the model archaeologist, you’re pretty much right. Archaeologists are one part scientist, one part scholar, and one part adventurer. In this episode, learn all you need to know this fascinating field.

May 27, 2014

When your kid boils over in the grocery store, it can be tough to stay calm and ignore it, but that’s precisely what experts prescribe parents do to deal with temper tantrums. Learn about the anatomy of a tantrum and the best way to deal in this episode.

May 22, 2014

Each year, as snow builds on peaks across the world’s mountain ranges, the potential for avalanches builds. Learn about the science of how these natural disasters develop and are triggered – and how to survive one if you ever find yourself trapped.

May 20, 2014

Your body right now is home to a liter of mucous, countless
fat-loving mites, acid that can dissolve metal and plenty of other gross and interesting stuff. Learn all about your body and its functions here.

May 15, 2014

You may have heard of the Paleo Diet, also known as the Caveman Diet, but do you know the science it’s based on? And did you know that the saturated fat it and other diets avoid may be healthier than you were taught in school?

May 13, 2014

If it was possible to take a full scan of all of the DNA of every cell in and on your body the results would be startling: Only 1 percent would be human. The other 99 percent comprises all of the bacteria, fungi, viruses and other microbes you literally cannot live without.

May 8, 2014

Suffering from bipolar disorder means a lot more than your garden variety mood swings. Bouts of mania and depression are just the headlines. There are also theories that there’s a link between bipolarism and creativity. Learn all about this disruptive, yet manageable disorder.

May 6, 2014

Gypsies were called that because they were long ago mistaken as Egyptians. Even their more appropriate name, Roma, is a misnomer since they’re not from Romania. Find out about the mysterious history of this nomadic and genuinely misunderstood ethnic group.

May 1, 2014

For millennia people used marijuana for fun and medicine. Not until the 20th century that was it vilified, unfairly say many. Weed has done lots of good things, from alleviating cancer symptoms to unlocking secrets of the brain. Learn all about pot here.

April 29, 2014

Being a card-carrying member of the ACLU is tantamount to being a super liberal to some, but the ACLU ultimately displays no allegiance to any political philosophy, only to whomever’s Constitutional rights are being infringed upon, from Nazis to the NAACP.”

April 24, 2014

Occasional bad breath is one thing, halitosis is another. Or is it? From its odd origins as a marketing ploy to modern weight loss diets that can induce this embarrassing condition, you can learn all about bad breath here.

April 22, 2014

Sure today Mars would kill you with its thin, toxic atmosphere and cold desert temperature swings of 100 degrees, but early on it and Earth were practically twins. Find out how the two planets diverged and if there might be life on the Red Planet.

April 17, 2014

What’s old is new again as far as burlesque is concerned. Come explore what was an old-timey outlet for empowering women that later gave rise to the striptease once men started running the show. Now, women have reclaimed the art and it is benefiting.

April 15, 2014

Dissociative Identity Disorder was known as multiple personality disorder until a case of mass hysteria brought on by the movie-mad public and unscrupulous psychiatrists led to a stigma over the term. Now psychiatry has gotten serious about the condition.

April 10, 2014

While evolution gets all the spotlight for moving species
into better versions of themselves, but really it’s natural selection that is the engine driving the process. Learn all about this elegant scientific observation that forms the basis of life.

April 8, 2014

Charles Darwin wasn’t the first or only scientist to grasp the theory of evolution through natural selection, but he became its father and icon. Learn about the man who reluctantly but bravely became the source of the divide between religion and science.

April 3, 2014

They are among the more reviled concepts of modern life, and yet they are as inevitable as death. Join Josh and Chuck as they look into the history and the basis of income taxes in the U.S. in this episode.

April 1, 2014

With 3D printing you can print not just pictures and words, but actual objects from files. And as costs come down, the list of things you can print expand: from food, to organs, to guns.

March 27, 2014

Landslides are a form of mass movement of the Earth, and with the amount of death and destruction they wreak on the people and towns they cover, their toll can be massive. Learn all about landslides in this episode with Josh and Chuck.

March 25, 2014

Those movies where someone gets hit on the head and can’t remember who they are anymore? They’re actually not too far off from the reality of amnesia. Learn everything about this bizarre and life-robbing condition with Josh and Chuck.

March 20, 2014

It is literally all around you (and even inside you) – electricity makes up the basis of modern life. But what exactly is electricity and how does it work? Josh and Chuck chase away the darkness and explain electricity in their usual electrifying way.

March 18, 2014

Most Europeans first encountered tattoos after sailors visiting the South Pacific returned covered in them. From then on, with a few notable exceptions, tattoos have been associated with fringe dwellers in the West. Learn all about tats in this episode.

March 13, 2014

Black boxes are designed to be the only survivor of plane crashes so they can live to tell the tale of what went wrong to prevent future accidents. Learn about how these grim devices are made, how they’re tested and the tales they’ve told.

March 11, 2014

Skateboarding started out as something bored surfers did when the waves weren’t breaking, but after a few improvements to the design, it took off like a rocket to become its own cultural phenomenon. Come gleam the cube with Josh and Chuck.

March 6, 2014

No longer weird, possibly still desperate and approaching normal, online dating’s been around almost as long as the Internet itself. So what exactly is the best way to find love online if one were so inclined to do so? Josh and Chuck hook you up.

March 4, 2014

The idea of pious monks imbued with unbridled power and with a penchant for dealing torture and death is a scary one indeed, and one both Spain and the Catholic Church have tried to reconcile since the Spanish Inquisition ended in the 19th century.

February 27, 2014

On May 4, 1970, four days of anti-war protests at Kent State University in Ohio culminated in the unthinkable when Ohio guardsmen opened fire on protesters, killing four students. How could this tragedy take place?

February 25, 2014

Their soft white bodies look creepy and, to be sure, they are, but termites are pretty amazing bugs. They build ventilation systems into their mounds, poop on their enemies and grow mushrooms. Learn all the neat stuff you didn’t know about termites here.

February 20, 2014

Amputation is one of the oldest surgeries and an even older punishment for crime, but it wasn’t until the American Civil War and its 50,000 amputations that the procedure began to hit its stride. Learn about amputation and who it attracts in this episode.

February 18, 2014

A Roman senator once said, Mankind can live without gold, but not without salt. Right he was. The human body needs salt so much we have developed a taste for it specifically. But too much salt can be toxic. Learn about salt’s role in human history and how we get it from the Earth in this episode.

February 13, 2014

You know the cavemen, a race of human cousins who lived exclusively in caves? They didn’t exist. Sure prehistoric hominids used caves sometimes but they lived in other places too. Luckily the time they spent in caves has given us a glance at their culture thanks to the protective environments of caves.

February 11, 2014

Since Sartre classified things that make us happy into the categories of having and doing, science took up the investigation into materialism and experientialism. The results have been in for a while: experiences win by a wide margin, but why exactly?

February 6, 2014

It wasn’t until the 19th century that America’s dominant sign language was developed and despite its co-existence alongside English, a user would be hard-pressed to sign with a British person. Find out about the independent evolution of sign language in the U.S. and how intuitively sensible it is.

February 4, 2014

With savvy and health-conscious people taking control of their wellbeing through apps and sites, technology is meeting the desire for individuals’ responsibility for their health. But is the day coming soon when doctors will be obsolete, replaced by computers that read our health-related data to treat us?

January 30, 2014

Back in the early 20th-century mysterious skulls made from polished crystals began to enter the collections of private enthusiasts of the occult. Discovered by adventurers raiding sacred areas of the ancient world, these skulls were said to possess unusual supernatural powers and their owners, who could use them to “will death” to others. Learn about the strange history of these curious and suspect archaeological finds in this lost episode of Stuff You Should Know.

January 28, 2014

Lately it’s been common news fodder that Congress uses its ability to raise the debt ceiling to hold the executive branch hostage to its demands, but exactly how does that work, and what does the debt ceiling do? Learn about it in this fascinating episode.

January 23, 2014

Perhaps you didn’t realize that when you search the web you’re only skimming the surface. In fact, the types of web pages that turn up in your search engine results represent only a mere fraction of the total web. Immerse yourself in the Deep web and its dark corners in this episode.

January 21, 2014

There are lots of common “facts” that everyone knows, but it turns out a lot of them are actually false. Join Josh and Chuck as they put on their berets and suspenders and take the hot air out of some common everyday myths to make this a slightly smarter world.

January 16, 2014

In the early 21st century a trend of people who claim to be able to telepathically and clairvoyantly communicate with animals has grown. Today, the concept of visiting a pet psychic to find a lost pet, find out why a pet is behaving badly or even to learn if a pet is ready to be put to sleep is becoming more commonplace, but is there any basis to pet psychics’ abilities? Join Josh and Chuck as they investigate the pet psychic phenomenon.

January 16, 2014

In the early 21st century a trend of people who claim to be able to telepathically and clairvoyantly communicate with animals has grown. Today, the concept of visiting a pet psychic to find a lost pet, find out why a pet is behaving badly or even to learn if a pet is ready to be put to sleep is becoming more commonplace, but is there any basis to pet psychics’ abilities? Join Josh and Chuck as they investigate the pet psychic phenomenon.

January 14, 2014

The legend of King Arthur is very old and very established. By the time the king who saved Britain and united it was first written about, his story was already hundreds of years old. And while many of the details of his life and adventures, from the Lady of the Lake to Merlin the Magician, seem fictional some archaeologists believe that Arthur — and much of his life — was real.

January 9, 2014

Although lots of people incorrectly believe the filibuster was an intentional rule created by the founders of the U.S., this ancient method of stalling legislation was actually brought about in America by accident. Learn the ins and outs of this contentious quirk of parliamentary rules that allows a single senator to hijack the proceedings of the entire legislative body in this episode.

January 7, 2014

Were you to be the unfortunate victim of a limb removal of any sort, you could take hope. Here in the 21st century, doctors have gotten pretty handy at reattaching arms and legs, replacing thumbs with toes, rebuilding breasts, all to great success thanks to microsurgery techniques.

January 2, 2014

Do you know that hulking refrigerator in your kitchen emits CO2 thanks to the electricity it uses each year? It’s a comparatively small amount, in truth, but enough that some people have foresworn their fridge and adopted a life without one. Included are bonus food storage tips.

December 31, 2013

We have within our grasp here on Earth the technology that could make interstellar travel a reality within as little as a few decades and it doesn’t require any exotic fuel. In fact, it only requires sunlight and an initial blast into orbit to begin a steadily increasing sail to the stars.

December 26, 2013

As part of their strange, ongoing suite on circus arts, Chuck and Josh discuss one of the more dangerous crowd favorites, aspirating extremely flammable chemicals from one’s mouth onto a flame, creating a ball of fire. It’s straightforward, yes, and stunningly hazardous.

December 24, 2013

It’s finally here, the best episode of the year! It’s time to settle in by a nice fire, wrap up in a blanket, heat up a toddy and gather your loved ones around the mp3 player to hear Chuck and Josh talk about all of the things that make Christmas so merry and bright.

December 19, 2013

Since the Supreme Court’s ban on capital punishment was reversed, states have sought a humane method of killing sentenced criminals. They settled on lethal injection, but is this quasi-medical means of killing as quick and painless as we think?

December 17, 2013

When a suspect or prisoner goes on the lam there are plenty of ways to hide: in plain sight, in the mountains, in another country. There are as many types of ways law enforcement uses to track wanted people as their are ways to go on the lam, but there are some founding principles to carrying out a successful manhunt and they actually include you. Learn about how the fuzz tracks down fugitives and how it’s evolving in the age of social media in this episode.

December 12, 2013

It’s a pretty amazing feat to dig a tunnel beneath a body of water that’s big enough (and safe enough) to drive a train through. While humans have been digging underwater tunnels for thousands of years, it wasn’t until the late 19th century that it became viable on a large scale. In this episode, Chuck and Josh explore the ins and outs of the engineering triumph that is digging below water.

December 10, 2013

After she was diagnosed with the cervical cancer that shortly killed her, a tissue sample was taken from Henrietta Lacks in 1951 without her knowledge. Those cells would go on to become the first immortal line of human cells, something of enormous benefit to science and humanity as a whole. But while the line, called HeLa cells, became a multi-billion-dollar industry, her family languished without health care insurance. Learn about this complex case of private rights and scientific advancement in this episode.

December 5, 2013

Thanks to the amazing properties of magnets, clever engineers have figured out how to make entire trains levitate above their tracks, letting them move frictionlessly and allowing them to reach incredible speeds. Learn about how maglev trains work and what’s taking so long for us to get aboard in this episode.

December 3, 2013

In this episode, Josh and Chuck teach you everything you ever wanted to know but were too freaked out to ask about castration. Learn about the history of removing male genitalia, why some parents had it done to their sons, how the state has become the main agent of castration in the last several decades, and why some people who are not crazy decide to become castrated themselves.

November 28, 2013

On the day after Thanksgiving, Americans go kind of crazy for the deep discount sales that kick off the holiday shopping season in stores. So crazy, in fact, at least four people have lost their lives and as many as 63 others have been injured during Black Friday sales. But as profitable as Black Friday is, some retailers are thinking about discontinuing the tradition to find ways to to make even more money. Learn all about this bizarre, uniquely American holiday custom in this episode.

November 26, 2013

Recorded live at the Los Angeles PodFest, this episode of SYSK delves into the longstanding attempt to break down what humans find funny into a scientifically reproducible formula. Join Josh and Chuck as they examine just why this extremely unfunny quest will (thankfully) never be realized.

November 21, 2013

For the 50th anniversary of the assassination of President John F. Kennedy in Dallas, Josh and Chuck delve into the killing, the investigations and the conspiracy theories to get to the bottom of an enduring national question.

November 19, 2013

People have been consuming chocolate for at least a couple thousand years, but it’s only been in the last hundred that humanity has arrived at its crowning achievement: the smooth, creamy milk chocolate bar. Find out about the history of chocolate, how it’s made and how it affects your mood in this episode.

November 14, 2013

If you’ve ever been bitten by a wolf, you’re probably familiar with the anxiety of waiting for the next full moon to see if you become a werewolf. Learn all about the lore, mental illness and rules behind lycanthropy, one of civilization’s oldest metaphors.

November 7, 2013

They may be the most famous explorers in U.S. history, but
there are plenty of interesting details to the Lewis and Clark expedition that history has allowed to fade. Learn about the origin and the aftermath of America’s first early push Westward in this episode.

November 5, 2013

Despite its knights, bishops and castles, the game of chess has been around a lot longer since the Medieval Age. And it wasn’t even invented in Europe – chess comes from 2nd-century India, when some unknown inventor created what has come to be considered the perfect game. Learn all about the history of chess and how to play it in this engrossing episode of Stuff You Should Know.

October 31, 2013

After her daughter and husband died, heiress Sarah Winchester became obsessed with the idea that spirits haunted her and to appease them she had to have a house continuously built for them. So she did – 24 hours a day for 38 years.

October 30, 2013

It’s Halloween, and Josh and Chuck are ready to creep you out with this year’s spooky story, Algernon Blackwood’s scary short story, The Empty House. Tune in, turn down the lights and prepare for chills to run down your spine as they read this classic bit of horror fiction.

October 29, 2013

Although most people who’ve used Ouija boards don’t think they’re communicating with the beyond, there is something mysterious about how it works. Learn the ins and outs of the popular parlor game that sprang directly from the 19th-century spiritualism movement in this episode.

October 24, 2013

Perhaps you equate the term to conspiracy theories and Holocaust denials, but revisionism is a genuine discipline in the field of historical study. And thanks to revisionists, we now include a lot more reality – and previously
unsung people – in the history of our nations. Learn about historians determined that history is far from set in stone in this episode.

October 22, 2013

You know how when you see a guide dog leading a blind person to their destination and you think, “There goes a truly great dog?” It turns out you are absolutely correct. Guide dogs are about as special as dogs can get and it’s through years of hard work. Learn about the ins and outs of guide dogs in this episode.

October 17, 2013

Times are still kind of tough, but there are some time-tested and easy ways to get ahead and in this episode Josh and Chuck explore them. Learn about not only how to save, but also how to make your new-found dough grow.

October 17, 2013

Times are still kind of tough, but there are some time-tested and easy ways to get ahead and in this episode Josh and Chuck explore them. Learn about not only how to save, but also how to make your new-found dough grow.

October 15, 2013

It’s a familiar theme, an indigenous group’s culture falls apart when exposed to European ideals, weapons and disease. For the Maori of New Zealand, however, a determined effort to preserve and revive its ancient identity has started to pay off. Join Josh and Chuck as they explore the complexities of Maori culture.

October 10, 2013

One of the fields of forensic investigation, handwriting analysis is based on the principle of uniqueness – that each person writes in their own peculiar way. Learn about this interesting area of crime fighting and how it’s worked to advance itself as a real science.

October 8, 2013

During the siege of Syracuse in 214 BCE, the city-state’s resident genius, Archimedes, built a number of clever war machines to thwart the invading Roman fleet. One invention, the death ray, has been considered the stuff of legend. But could it have been real?

October 3, 2013

The US has developed some great equipment for peering into deep space that can also be used to great effect when trained on Earth. Now NASA is using satellites to track natural processes around the globe in an effort to better predict natural disasters like hurricanes and volcanoes.

October 1, 2013

You’ve heard all about diplomatic immunity, but we’ll bet you don’t really know how it works. Take some time to get into the nuts and bolts of this ancient and bizarre international custom and just how an embassy can be considered sovereign soil in this episode of SYSK.

September 26, 2013

Back in the 1990s, Congress effectively banned the scientific study of gun violence. Still, a handful of researchers plugged on and produced a small body of work about the effect of the presence of guns on the human psyche. Chuck and Josh look at the evidence.

September 24, 2013

Back in the mid-1980s a new and extremely potent drug hit the scene: crack cocaine. In short order, America was in the grip of both a sweeping addiction and a state of hysteria over use of the drug and the social consequences of crack, like crack babies. Now, 30 years on SYSK takes a look back at the receding wave of the crack epidemic and its lasting legacy on America.

September 19, 2013

Chuck and Josh have covered just about every aspect of death except dying itself. Here, they fulfill the death suite of podcasts with an in-depth look at just how people die, what happens to the body during the dying process and how people accept death — and what they regret not having done while they lived.

September 17, 2013

Improvised explosive devices were the primary killer of American troops in Iraq and continue to top the list in Afghanistan. Their use is so prevalent among guerrillas and insurgents because they are so effective. They are easy to put together with parts that are easy to obtain and they are easy to hide. Learn about these terrible weapons in this episode.

September 12, 2013

In the early 1990s, Japanese researchers found a strange anomaly in their study subjects, five people who had inexplicable heart attacks. From this first investigation has come a scientific mystery: Is it possible that the sudden loss of a loved one can be so difficult to bear that it can actually cause a heart attack and maybe kill you? Could the romantics be right?

September 10, 2013

The first attempt at breast augmentation surgery was on a dog. The second on a woman who went in for tattoo removal. From those weird origins hundreds of thousands of breast implant procedures are now carried out each year. Find out all about the advancements and techniques in increasing your bust.

September 5, 2013

There are few things more futile than trying to count all of the money in the world. Even many governments have no idea how much currency they have issued. But that won’t stop Chuck and Josh from trying and explaining why we can’t be sure how much money exists and the problems with flooding the world markets with bread.

September 3, 2013

Sometimes providence smiles on historians. Thus is the case with the Rosetta stone, an ancient Egyptian tablet that served as the key for unlocking hieroglyphics, lost to time for a millennia. Learn about the international intrigue, rivalry to translate it and the luck that led to the founding of
Egyptology.

August 29, 2013

Just before Francisco Pizarro arrived in South American in 1532, the Inca empire covered 350,000 square miles and boasted a million inhabitants. Yet Pizarro managed to take down this vast, powerful and advanced bureaucracy with only 168 men. Find out how and learn about the Inca on this episode.

August 27, 2013

It’s a pretty miserable thing to break a bone. There’s the
initial blinding pain, all of the medical procedures during a trip to the hospital and then, in the best case example, you have to wear a cast for four months. Beneath all of this misery, though, your body is carrying out some pretty amazing processes.

August 22, 2013

The annals of history hold a special place for people who have carried out treachery and betrayed their own. Thousands of years later, their names are still synonymous with being a scoundrel around the world. From Marcus Brutus to Vidkun Quisling and more, Josh and Chuck examine some of the bigger turncoats to live — and exonerate others.

August 20, 2013

When the Jet Age came about, pilots found they had a brand
new problem with their brand new planes: how to bale out when they found
themselves in a pinch at 700 mph. In the mid-1940s, aerospace engineers got to work coming up with a fascinating and complex lifesaving device, the ejection
seat.

August 15, 2013

You’ve seen them in your home and probably squealed in terror, but now it’s time to learn all about cockroaches. From their ability to run incredibly fast to the appendage that alerts them when you’re about to whack them with your shoe, cockroaches are fascinating creatures that deserve your respect.

August 13, 2013

If there is an American legend who is both real-life and larger-than-life it is Davy Crockett. While he may not have “”kilt him a b’ar”” when he was three, he definitely did personify both the best and the worst of American individualism during the age of Manifest Destiny. Learn all about the man behind the coonskin cap in this episode.

August 8, 2013

About 2,400 years ago Aristotle mentions the use of diving bells, apparatuses that convey divers to the bottom of the sea — or at least below the surface of the water — and allows them to breathe — at least until the air runs out. Learn about the physics of this clever and ancient invention and how it’s been used to sabotage enemy boats and build the Brooklyn Bridge.

August 7, 2013

In this special episode of Stuff You Should Know, Chuck and Josh tip their hats to Shark Week with an old-fashioned radio play. Join the guys (and a few guests) as they present a dramatization of the 1916 Jersey Shore shark attacks.

August 6, 2013

That laziest of backyard games, horseshoes, is also a very ancient one, developed by people following Greek armies more than 2,000 years ago. Since then, the game of horseshoes hasn’t evolved too much, which would indicate that it has reached perfection. Learn about the rules of this game, one of the few things in life where close counts.

August 1, 2013

The Babylonians, one of the earliest civilizations, were the first to use fingerprints to differentiate people, but it wasn’t until the 19th century that prints were used for crime fighting. Ever since, analyzing, classifying and collecting fingerprints to catch criminals and positively identify people has advanced, but is it valid?

July 30, 2013

Dressing up in duct tape-covered cardboard suit of armor and pretending you’re an elf warrior for a weekend at a state park might sound like a pretty embarrassing thing to do, but that probably just means you’ve never done it. Join Josh and Chuck as they explore the imaginative world of LARP – live action role playing games.

July 25, 2013

Yes, your brain may have just flash-dried from boredom at the thought of learning about maps, but it turns out they are a lot more than just tools for navigation. Maps are two-dimensional representations of how we imagine our world, with imagine being the operative world since every map in existence is riddled with errors.

July 23, 2013

Being ravenous eaters of decaying flesh, vultures have long been shunned by humans. But because of their disgusting habits, vultures provide a much-needed service to the rest of the organisms on Earth, making them the unsung heroes of their ecosystems.

July 18, 2013

Ever since the real estate bubble in the U.S. burst in 2008, American cities have had to deal with a substantial uptick in abandoned houses. Faced with hundreds of thousands more than usual, new questions have arisen pertaining to who owns a house the owner has walked away from and just what to do with it.

July 16, 2013

When you need to take down a 20-story building, a wrecking ball won’t do. Instead, you’ll need to turn to the handful of companies in the world that are capable of safely and successfully bringing down a building by blowing it up.

July 11, 2013

Now what you hear is not a test, instead it’s Chuck and Josh discussing the cultural history of the Hip-Hop movement. Born out of the South Bronx, by way of Jamaica, Hip-Hop culture grew up suddenly as DJs learned to use two turntables at once. Check out this episode of Stuff You Should Know to learn about the origins and evolution of Hip-Hop.

July 11, 2013

Now what you hear is not a test, instead it’s Chuck and Josh discussing the cultural history of the Hip-Hop movement. Born out of the South Bronx, by way of Jamaica, Hip-Hop culture grew up suddenly as DJs learned to use two turntables at once. Check out this episode of Stuff You Should Know to learn about the origins and evolution of Hip-Hop.

July 9, 2013

Warning: This episode on instruments designed solely to produce extreme human suffering during the Middle Ages in Europe is very graphic in nature. Seriously, if you’re squeamish, maybe pass on this one.

July 4, 2013

Back in 1966, the Supreme Court decided that suspects in criminal cases had the right to be reminded that they didn’t have to talk to the fuzz if they didn’t want to, as stated in the 5th amendment. Since that ruling, scores of other cases have shaped and defined the ruling that created a staple of police procedural dramas.

July 2, 2013

For about 375 million years, plants have been using pollen (aka plant sperm) to propagate their species. And the technique has stuck around because it works. Join Chuck and Josh for a cozy look at the ins and outs of plant reproduction.

June 27, 2013

You’ve probably heard about Burning Man, it’s a week-long party in the middle of a desert made of 50 thousand people living pretty much without rules, pretty much without any exchange of money and often nude and on drugs. Get the background on this social experiment that began in 1986 and has grown in size and scope ever since.

June 25, 2013

Grigori Rasputin, the Russian charismatic cleric and political advisor to the ruling Romanovs, is said to have been poisoned, shot, shot again, bludgeoned and drowned. Exactly how did he die and how would such a legend grow around a modern figure?

June 20, 2013

According to a 2009 poll, more Americans believe in ghosts than don’t. But what are ghosts exactly? If they do exist, what are they made of and why are they hanging around? Josh and Chuck explore both sides of the divide between belief and skepticism on the topic of ghosts and look at some pretty cool explanations for hauntings.

June 17, 2013

In 2008 Bitcoin, the world’s first decentralized, anarchistic all-digital currency, was introduced to the world. Its value has risen, fallen and risen again and speculators, techies, libertarians and economists alike are taking it seriously.

June 11, 2013

There is an extremely rare condition where the sufferer is convinvced that everyone around him is an impostor posing as their friends and family. Learn about the neurology behind this strange and sad mental disorder in this episode.

June 11, 2013

You can trace the origin of men dressing as women in public back to classic Greek theater, but modern drag queens own their real inception to vaudville. Dip your toe into the politics and culture of this unique phenomenon with Josh and Chuck.

June 6, 2013

Sure, you know that trees have an impact on climate change: to wit, fewer trees mean more atmospheric CO2. But did you know that trees can actually impact local and immediate weather? Learn about why you should love trees even more than you do.

June 4, 2013

Before Jamestown became the first successful English colony in the New World, an entire group of settlers vanished. For the last 430 years, Roanoke has been an American mystery. Learn the theories of what became of the lost colonists in this episode.

May 28, 2013

Sure, you’ve probably laid in one at the store or a funeral home, but how much do you know about receptacles used to bury the dead? We’ll bet you’ll learn plenty – like the difference between a coffin and a casket – in this episode.

May 28, 2013

Entire TV shows are dedicated to them and Americans love to watch a live one, but police chases aren’t as routine as they seem. While police assert chases are important tools, critics say cops engage in chases too often and too easily.

May 23, 2013

With Post-traumatic Stress Disorder the sufferer relives, over and over again, the worst moment of his life. What’s worse is medicine still doesn’t know how to treat it. Learn about this condition and how it’s leading to a n understanding of memory.

May 21, 2013

Cicadas are crawling out from underground, where they have been hiding in the darkness for almost two decades. As of May 2013, they’re invading the East Coast From North Carolina to New York. But why? Learn more about cicadas with Josh and Chuck.

May 16, 2013

In the 87 years since they were invented aerosol cans have protected soldiers, temporarily fixed flat tires, killed a boy who used too much deodorant and had their contents banned by most countries for wrecking the ozone layer. Tune in to learn more.

May 14, 2013

With the exception of lobotomies, no other psychological treatment has a worse reputation. But thanks to some thoughtful tweaks, ECT has lately emerged from the dark ages and toward the respectable forefront of treatment for major depression.

May 9, 2013

Once in a while, all the necessary factors converge to produce a peculiar nationalized sexual fetish. In China, that fetish was foot binding and over a millennia three billion Chinese women’s feet were brutally disfigured for men’s pleasure.

May 7, 2013

The West has gotten rich off the backs of underpaid labor living elsewhere; people who are dedicated to Fair Trade feel it’s time people at a disadvantage should stop being exploited. The concept is simple – just pay workers fairly for their labor.

May 2, 2013

Despite what you’ve heard, Dungeons and Dragons isn’t just for geeks, it isn’t satanic and it’s actually a great way to exercise your imagination. Learn about the basics of D&D, its place in pop culture and the controversy the game has stirred.

April 30, 2013

Ever since people have had secrets, other people have been looking for ways to get it out of them. Law enforcement and chemistry alike have searched for a drug that can remove the ability to lie. Join Josh and Chuck as they check in to see how it’s going.

April 25, 2013

What is it that makes us suddenly draw in a deep breath through a wide-open mouth? researchers really don’t know. Whether the answer is physical, mental or even contagious there is pretty much no chance you won’t yawn during this episode.

April 23, 2013

Whether you’re sticking them to the fridge or using them to transpose sound to tape, magnets are surprisingly interesting. And knowing just how and why magnets work will make you more interesting, which is why you should listen to this episode of SYSK.

April 18, 2013

The idea that a person who can’t understand the crime they’ve committed should be inculpable is a longstanding pillar of Western criminal law. Learn about some of the prominent and overlooked cases where the accused has plead insanity in this episode.

April 16, 2013

You can tell a lot about a culture through marriage statistics: what age people get married, how many divorce, who is excluded from legal marriage. It forms a picture of how a society interacts with itself. Learn more about marriage in this episode.

April 11, 2013

It’s a touchy subject – if you find gender-based differences between brains, does that mean there are differences in intellect? Surprisingly, though there are demonstrable differences, men and women use their brains differently to achieve the same ends.

April 9, 2013

It’s pretty much impossible to describe duckbill platypuses without using the word “hodgepodge”. These mammals share features with birds, reptiles and even sharks. Learn about these peculiar little creatures in this episode.

April 9, 2013

It’s pretty much impossible to describe duckbill platypuses without using the word “hodgepodge”. These mammals share features with birds, reptiles and even sharks. Learn about these peculiar little creatures in this episode.

April 4, 2013

Since 1969, the five stages of grief have become pretty well known. But later researchers are finding that grief is rarely cut and dried, and may not be as widely experienced as we thought. Join Josh and Chuck as they look at the sad science of grief.

April 2, 2013

The Panama Canal is one of the greatest engineering feats ever undertaken. First conceived of in the 1580s and completed in 1914, the canal’s fascinating history includes a stint where it was considered U.S. soil. Learn all about it on this episode.

March 28, 2013

They have become such a ubiquitous tool for international interventions that it seems like no-fly zones have been around forever. But it was only the 1990s that the first one was enacted. Learn about this peculiar military tool with Chuck and Josh.

March 26, 2013

There’s a lot of debate about whether pre-agricultural humans existed in a more harmonious state than we do today. Did we slip out of Eden when we began building large scale societies? Or is it possible that the most peaceful time in history is right now?

March 21, 2013

About 30-40 percent of humans suffer from some sort of allergy. The big joke, though, is that every sufferer is the victim of mistaken identity. Allergies are the result of a hypersensitive immune system mistaking a harmless protein for a foreign invader.

March 19, 2013

After WWII, the government of South Africa turned inward to focus its attention on domination of the white minority over the non-white majority. It took an internal struggle and the voice of the world to finally end the terrible practice of “apartness.”

March 14, 2013

The USPS is currently teetering on the edge of going under and there are a lot of plans to save it, from cutting service to creating federally-protected email addresses. Join Chuck and Josh as they explore the history and future of the postal service.

March 12, 2013

Creating composite drawings of suspected criminals from eyewitness accounts has been around since a Frenchman introduced it in the 19th century. Despite the introduction of new techniques and software it hasn’t changed all that much.

March 9, 2013

Futurists have unnervingly predicted an impending moment in human history: the Singularity, when a superhuman artificial intelligence is created. What will become of humans? Enslavement? Extermination? Utopia? Find out with Josh and Chuck.

March 9, 2013

In movies and stories, zombies are undead menaces that lurch around mindlessly, in search of flesh — and braaaaaains! Where did the idea for zombies originate? Do they exist outside of fiction? Tune in to this podcast from HowStuffWorks.com to find out.

March 9, 2013

With the end of the shuttle program and an International Space Station still in need of supplies, the aerospace industry is working the kinks of out of a century-old idea to build a service elevator from Earth to outer space.

March 9, 2013

With the end of the shuttle program and an International Space Station still in need of supplies, the aerospace industry is working the kinks of out of a century-old idea to build a service elevator from Earth to outer space.

March 9, 2013

Sleep behaviors are pretty fascinating. Some people snore, some grind their teeth — and some take a little stroll, or perhaps a drive. In this episode, Josh and Chuck investigate how sleepwalking, or somnambulism, works.

March 7, 2013

Anyone who knows anything about Jean-Claude Van Damme knows he played a French legionnaire in the movies. He was just one of many actors to star in films that romanticized this mercenary force. Check out the details in this episode with Josh and Chuck.

March 7, 2013

Anyone who knows anything about Jean-Claude Van Damme knows he played a French legionnaire in the movies. He was just one of many actors to star in films that romanticized this mercenary force. Check out the details in this episode with Josh and Chuck.

March 5, 2013

The term “one-hit wonder” gets thrown around a lot, but Chuck Bryant went to the trouble to really define what makes a one-hit wonder in the article this episode is based on. Join him and Josh as they get to the bottom of this disparaging term.

March 5, 2013

The term “one-hit wonder” gets thrown around a lot, but Chuck Bryant went to the trouble to really define what makes a one-hit wonder in the article this episode is based on. Join him and Josh as they get to the bottom of this disparaging term.

February 28, 2013

In February 2013, Pope Benedict said he would become the first pope to retire in 600 years. Check out this episode of Stuff You Should Know to find out just what the pope does and the process of choosing a new one.

February 26, 2013

You have a golden opportunity to make yourself into a worthwhile human being by learning how to perform CPR. The chances are you’ll never need to use it, but knowing how never hurts. Listen in and get primed to take a course on real-life life-savin’.

February 23, 2013

How does time travel work? Could it ever cross the line from science fiction into science fact? Join Josh and Chuck — along with a live audience at the 2012 Comic-Con — as they explore the ins and outs of time travel.

February 23, 2013

Psst. You want to know how governments and corporations get the drop on one another? The frontline of intelligence is populated by spies. Learn about how spies get and transfer information (and why they do it) in this episode of Stuff You Should Know.

February 21, 2013

Over 400 million years, the day has grown two hours longer thanks to Earth’s slowing axial rotation. While it will be a long time before it stops spinning, it never hurts to plan. Listen to Chuck and Josh discuss what a still Earth would look like.

February 21, 2013

Over 400 million years, the day has grown two hours longer thanks to Earth’s slowing axial rotation. While it will be a long time before it stops spinning, it never hurts to plan. Listen to Chuck and Josh discuss what a still Earth would look like.

February 19, 2013

You know the Beach Boys and you’ve seen Hang Ten shirts, but there’s a lot more to surfing. Join Josh and Chuck to learn more about surfing, from how to pop up on the board to the physics of waves and the Sport of Kings’ Hawai’ian origin.

February 14, 2013

As is usual for SYSK, Josh and Chuck go over some, but not all, of the entries in this list of ten myths about the brain. While it lives in your noggin you don’t really have much of a grasp on your brain and how it works. You think you do, but you don’t.

February 12, 2013

Jet lag has only been a real condition since 1958. Also known as desynchronosis, jet lag can lead to sleeplessness, irritability, diabetes and cancer. Learn about how the body’s natural clock runs and what happens when we cross time zones quickly.

February 9, 2013

It began with old-timey guys dropping dry ice on clouds. Since then weather modification was used to keep the 2008 opening ceremonies dry and flood the Ho Chi Minh Trail, but does it work? Learn about weather control plans, diabolical or otherwise.

February 9, 2013

It began with old-timey guys dropping dry ice on clouds. Since then weather modification was used to keep the 2008 opening ceremonies dry and flood the Ho Chi Minh Trail, but does it work? Learn about weather control plans, diabolical or otherwise.

February 9, 2013

Possibly the most horrifically-named disease anyone could contract, flesh-eating bacteria can lead quickly lead to amputations and death. Learn about how this disease works and how to prevent it in this episode with Chuck and Josh.

February 7, 2013

You use it to overcome your lower self (which wants you to eat cake until your vision blurs) in pursuit of the goals of your higher self (which wants you to avoid diabetes). Yet it was only the 1990s that researchers have begun to understand willpower.

February 5, 2013

We’re not so far off from being able to power cars using beer and banana peels, like Doc in Back to the Future. Rather than solving the energy crisis with Mr. Fusion, though, we’ll use the centuries-old technique of creating syngas through pyrolysis.

January 31, 2013

Over the course of history, humanity has only mined 161,00 metric tons of gold. Considering about 85 percent of gold is recycled, there’s a chance your jewelry may once have been part of an Incan headdress or Mycenaean face mask. Listen in to learn more.

January 29, 2013

They get blown up, shot, drowned and thrown out of windows on the silver screen – and we don’t even know their names. Stuntpeople are the unsung heroes of the movie industry. Learn the ins and outs of the stunt world and how one becomes a stunt person.

January 26, 2013

With less than a million neurons in their heads, bees shouldn’t be able to do much. Yet bees are capable of high functions like population economics and navigating by the sun on overcast days. Learn about these fascinating insects in this episode.

January 26, 2013

With less than a million neurons in their heads, bees shouldn’t be able to do much. Yet bees are capable of high functions like population economics and navigating by the sun on overcast days. Learn about these fascinating insects in this episode.

January 24, 2013

Medical ecology is concerned with understanding how microbes living inside us keep us healthy. The field’s first breakthrough is the fecal transplant, moving poop from a healthy person and into the gut of a sick person. It’s a real thing, and it works.

January 22, 2013

Fracking, the process of breaking trapped resources like natural gas and oil from shale, has led to a revolution in energy production in the U.S. It’s also given rise to increasing worries that the process can have sweeping environmental impacts.

January 19, 2013

How can experts determine a person’s cause of death? Join Josh and Chuck as they take a trip through the morgue and look over the shoulders of the often controversial coroners and medical examiners that open cadavers to determine how someone died.

January 19, 2013

When a person has alien hand syndrome, his or her hand can move involuntarily, and seemingly of its own volition. Tune in and learn Stuff You Should Know about this misunderstood syndrome.

January 17, 2013

If you drop a piece of food and pick it up within five seconds, is it still good to eat? Researchers have studied this and have also inadvertently shone a light on how utterly covered our world is with bacteria and germs. Prepare to shudder.

January 15, 2013

The Myceneans kicked off the habit of creating a mask of a deceased person’s face in deathly repose, and what began as an ancient rite has only recently fallen out of practice. Learn about this dignified but ghoulish custom with Josh and Chuck.

January 10, 2013

They’re always right there, taunting you: why do you have me, they ask? Why do men have nipples? It turns out there’s a good answer why and nipples on men aren’t entirely useless after all.Join Chuck and Josh for this heady investigation.

January 8, 2013

You’ve heard the warning before: If you’re being chased on land by an alligator, run in a zig-zag. Of course, the average person should be capable of outrunning an alligator. Josh and Chuck take the opportunity to explore alligator safety anyway.

January 3, 2013

From the moment it was established, the United States had headaches with terrorism of the pirate variety. For decades, the federal budget even include bribe money to pay them off. Learn all about this early threat on this episode of Stuff You Should Know.

January 3, 2013

From the moment it was established, the United States had headaches with terrorism of the pirate variety. For decades, the federal budget even include bribe money to pay them off. Learn all about this early threat on this episode of Stuff You Should Know.

January 1, 2013

For centuries North American tribes have told stories of a hairy wild giant in the wilderness, and once Europeans arrived they claimed to see it, too. Chuck and Josh examine the claims of believers and the rebuttals of skeptics in this evenhanded episode.

December 27, 2012

You know those shows where people wearing sensible shoes jog dogs around in circles? They actually represent the pinnacle of a long and complex path to glory for dogs and their owners. Join Chuck and Josh as they peek inside the American dog show.

December 21, 2012

Kick back and raise a glass of eggnog to Josh and Chuck as they carry on a new holiday tradition of exploring the ins and outs of all things Christmas – and maybe even warm your heart along the way. Happy holidays, everybody!

December 21, 2012

Kick back and raise a glass of eggnog to Josh and Chuck as they carry on a new holiday tradition of exploring the ins and outs of all things Christmas – and maybe even warm your heart along the way. Happy holidays, everybody!

December 20, 2012

In this episode, Josh and Chuck explore the history, cultural impact and feminist ire raised by the Barbie doll. The boys are joined by Gordon Javna, the founder of the Bathroom Readers’ Institute and publisher of Uncle John’s Bathroom Reader.

December 18, 2012

Since Winston Churchill predicted we’d grow meat in a lab by 1981, researchers have considered doing just that. And thanks to the current work of about 30 groups, we may be only years away from mass-produced artificial meat. But will anyone eat it?

December 13, 2012

The earliest depiction of a condom is found in a 15,000-year-old cave painting. Ever since humans realized sex led to children, we’ve been using condoms to prevent pregnancy. Join Josh and Chuck for this comprehensive tour of all things condom.

December 11, 2012

The U.S. stands proudly defiant and the world looks at Americans as dopes for the U.S.’s stubborn refusal to go metric. However, the States have been going metric for about 150 years. Find out what’s the haps in this weighty and measured episode of SYSK.

December 11, 2012

The U.S. stands proudly defiant and the world looks at Americans as dopes for the U.S.’s stubborn refusal to go metric. However, the States have been going metric for about 150 years. Find out what’s the haps in this weighty and measured episode of SYSK.

December 6, 2012

A 2012 report showed that the U.S. may be energy-independent in just a few years, but not too long ago the specter of peak oil loomed large on the political and economic landscape. Join Chuck and Josh as they visit the consequences of running out of oil.

December 4, 2012

Out of obligation, Chuck and Josh mention Twilight, but it is the longstanding vampire lore that gets the most attention in this examination of how the bloodsucking undead evolved from baby-stealing demonesses to suave counts in our collective psyche.

November 29, 2012

Entrances to the underworld have been places of wonder for eons, and humans have ventured into caves to sleep, hunt, create art and explore. Thanks to the hobby of caving, that tradition continues today. Bonus: Chuck discusses his caving experience.

November 27, 2012

Ah, autumn – arguably the most beautiful time of the year, thanks to the vibrant colors trees put on display as they close up for the winter. Ever wonder why and how trees change color in the fall? Chuck and Josh have it down pat and explain it here.

November 22, 2012

Sure the fatcats get all the credit for donating millions, but did you know US households making $20,000 or less contribute the highest percentage of their income to charity? Learn more (not to mention a sexy look at the U.S. tax code) in this episode.

November 20, 2012

In 2009, a fertility clinic controversially offered parents the ability to customize their children. How will society take the idea of designing children? Do we have a moral obligation to design better people? Join Josh and Chuck for this heavy episode.

November 15, 2012

You know how when you do a lot of crystal methamphetamine you get meth mouth, where your teeth decay? Of course you don’t! So check out this in-depth look on the most widely-abused hard drug in the world. Even tweakers will learn something new.

November 13, 2012

Star Trek was famous for its holodeck, a completely immersive holographic environment that could be any space a user wanted. Thanks to telemersion technology built for business conferencing, we’re starting to get close to that holodeck after all.

November 8, 2012

Futurists have unnervingly predicted an impending moment in human history: the Singularity, when a superhuman artificial intelligence is created. What will become of humans? Enslavement? Extermination? Utopia? Find out with Josh and Chuck.

November 6, 2012

The Yakuza trace their lineage back to the 18th century samurai, left masterless following political upheaval, who turned to lives of crime. After centuries, the Yakuza is still going strong, following both tradition and new avenues of illicit revenue.

November 1, 2012

Since a hostage standoff in Sweden took place in 1972 a peculiar and mysterious psychological phenomenon has had a name. But is Stockholm Syndrome real? And what conditions have to be present? Join Chuck and Josh as they look into this unusual condition.

October 30, 2012

Josh and Chuck have been planning this thing since spring and it’s finally here! Tune in to hear which listener’s scary story won the SYSK Halloween Horror Fiction Contest — and prepare to have your socks scared off just in time for All Hallow’s Eve.

October 30, 2012

Josh and Chuck have been planning this thing since spring and it’s finally here! Tune in to hear which listener’s scary story won the SYSK Halloween Horror Fiction Contest — and prepare to have your socks scared off just in time for All Hallow’s Eve.

October 25, 2012

Since the 1960s, the Pentagon has called for a suit that can make a soldier jump higher, run faster longer and generally be a badder dude. It’s only now that the materials needed are coming of age. Listen in to learn the state of exoskeleton technology.

October 25, 2012

Since the 1960s, the Pentagon has called for a suit that can make a soldier jump higher, run faster longer and generally be a badder dude. It’s only now that the materials needed are coming of age. Listen in to learn the state of exoskeleton technology.

October 23, 2012

You probably can recite five right now. Commercial jingles are designed to hijack your working memory and implant a product or service and they really work. Learn about the history of these insidious and catchy advertising vehicles with Chuck and Josh.

October 18, 2012

Bossing a lion around in front of a crowd at a circus has been an attraction for 200 years, but exactly how lion tamers get their captive wild animals to comply has evolved over time. Take a peek in the jaws of this odd profession with Josh and Chuck.

October 16, 2012

It wasn’t too long ago when black holes were strictly predictions in theoretical math. Over decades, astronomy has gotten better at uncovering these cosmic phenomena. Learn about how black holes form and their ability to spaghettify you in this episode.

October 11, 2012

Sure it’s everywhere and there’s a more-than-90-percent chance you eat it once a month. But we’ll bet you don’t know the full history of that pizza (or tomato pie) you’re about to chow down on. Join Chuck and Josh as they explain it to you, bite by bite.

October 9, 2012

It’s been called the world’s lungs, the world’s pharmacy and the world’s air conditioner. It takes up only 6 percent of Earth’s land, yet houses 50% of the world’s species. Find out the math behind why they may be gone in 40 years in this episode.

October 4, 2012

Creating fire was possibly the most important human discovery, but it’s easy to take for granted. But. Josh and Chuck get to the bottom of the chemistry of fire in their quest to explain everything in the universe.

October 2, 2012

Sure, Chuck and Josh have discussed it before, but it’s worth revisiting: Running moonshine led to the creation of NASCAR. Chuck and Josh aren’t even NASCAR fans and they think that’s cool. Join them as the investigate moonshine runnin’.

September 27, 2012

As ubiquitous as they’ve become, it’s easy to overlook the marvels of engineering that are subways. Chuck and Josh go boring as they explore these systems of tubes that must circumnavigate rock, rivers, cables and more to get you where you’re going.

September 25, 2012

There’s a secret war going on around us, and it’s happening on a daily basis. The Air Force recently launched a new unit specifically designed to carry out and defend against cyberwar. Go deep into this new and alarming type of war with Josh and Chuck.

September 20, 2012

A well-crafted piece of music can bring us to incredible highs and crushing lows, sometimes within the same song. Why does music affect humans this way? Join Chuck, Josh and special guest cellist Ben Sollee as they get to the bottom of music and emotion.

September 18, 2012

There’s a very good question that no one has yet satisfactorily answered: Where did life on Earth come from? Some look to the Red Planet as the source of life here, which, if correct, would make us all Martians. Is there anything to this out there claim?

September 13, 2012

If you want to control the masses, control what they read. After all, books are seeds that germinate new points of view. As a result, the struggle against banning books is contentious and continual. Learn more about banning books in this episode.

September 11, 2012

When Alfred Kinsey conducted his sex surveys he turned up, but ignored, a fourth sexual orientation: people who don’t experience sexual attraction. It took 60 years for Group X to gain a name and recognition, but with that has come increased scrutiny.

September 6, 2012

Science has a handle on fireflies and glowworms, but most bioluminescent animals live in the ocean and are tough to study. Today, researchers are still figuring out why some animals produce light. Dive with Josh and Chuck into this illuminating topic.

September 4, 2012

Over the course of human existence, thousands of nuclear weapons have been exploded on Earth and in space. With all of those tests, one can’t help but wonder how much fallout has been produced. Learn the tricks of the nuke-testing trade in this episode.

August 30, 2012

Possibly the most horrifically-named disease anyone could contract, flesh-eating bacteria can lead quickly lead to amputations and death. Learn about how this disease works and how to prevent it in this episode with Chuck and Josh.

August 28, 2012

When you vote in an American presidential election, you’re not voting for your candidate – you’re voting for a group of people you hope will in turn vote for your candidate. Listen in to learn more about the strange process for electing the president.

August 23, 2012

Did you know there are as many as 500,000 abandoned mines in the US, but the federal government knows where only 30,000 of them are? Learn about these places go from money pit to death trap when mine companies simply walk away.

August 21, 2012

If you’re an American adult, there’s a 1 in 4 chance you have a criminal record. While it’s less likely you’ve committed any serious crime, there are still repercussions to having a rap sheet as more employers use them to decide between candidates.

August 16, 2012

Putting lasers in space to blast Soviet missiles out of the air was a very real part of Ronald Reagan’s defense policy. While his “Star Wars” program was derided at home and abroad, historians are beginning to wonder if it didn’t help win the Cold War after all.

August 9, 2012

A shark attack is a terrifying experience for the victim — but are sharks really man-eating monsters with a taste for human flesh? Join Josh and Chuck as they ask why sharks attack, how attacks occur and which sharks are most likely to attack someone.

August 7, 2012

It’s the holiest month of the Muslim calendar, and for good reason. It was during the month of Ramadan that Mohammed began to issue the Koran. Learn about the customs and traditions behind observing Ramadan in this episode of Stuff You Should Know.

August 2, 2012

With the end of the shuttle program and an International Space Station still in need of supplies, the aerospace industry is working the kinks of out of a century-old idea to build a service elevator from Earth to outer space.

July 31, 2012

You know and love them as a fluffy chocolate nougat and maybe as a book and a movie, but musketeers were quite real and quite deadly. Visit with Josh and Chuck as they examine the elite special forces of 17th-century France.

July 26, 2012

How does time travel work? Could it ever cross the line from science fiction into science fact? Join Josh and Chuck — along with a live audience at the 2012 Comic-Con — as they explore the ins and outs of time travel.

July 26, 2012

How does time travel work? Could it ever cross the line from science fiction into science fact? Join Josh and Chuck — along with a live audience at the 2012 Comic-Con — as they explore the ins and outs of time travel.

July 24, 2012

White-collar crime often involves fraud and other nonviolent acts. For most people, the term “white-collar crime” conjures up images of CEOs conniving their way to fortune. But what is it, really? Listen in as Josh and Chuck break down the facts.

July 19, 2012

It’s true: The newspapers of the day reported that a cow (or perhaps its owner) was responsible for a fire that burned half of Chicago in 1871. Yet in 1997 Mrs. O’Leary and her cow were exonerated. Join Josh and Chuck to find out who’s probably to blame.

July 17, 2012

Fly, robin, fly indeed. No musical genre has risen and burned out as quickly as disco, and historians are still trying to unravel the animosity aimed at it. Join Chuck and Josh as they dig into disco’s underground roots and its sashay into the mainstream.

July 12, 2012

You’ve seen lightning before, and maybe you’re even afraid of it. You should be. The air is ripped apart and a sudden electrical discharge burning six times brighter than the sun connects with Earth. Learn all about it with Josh and Chuck.

July 10, 2012

The spectacular eruptions of steam and water we call geysers are only the tip of the proverbial iceberg, the result of thousands of years of specific natural conditions and physical processes. Learn the Stuff You Should Know about geysers in this episode.

July 10, 2012

The spectacular eruptions of steam and water we call geysers are only the tip of the proverbial iceberg, the result of thousands of years of specific natural conditions and physical processes. Learn the Stuff You Should Know about geysers in this episode.

July 5, 2012

Having started as an egalitarian answer to 19th-century newspapers, tabloids came to peddle shock and sleaze. They’ve cleaned up a bit, but they remain the world’s guilty pleasure. Learn more about the fascinating history of tabloids with Chuck and Josh.

July 3, 2012

An anomaly of geography, the shores of Dead Sea form the lowest dry spot on Earth. It’s been visited by millions, including King Herod and Cleopatra, all seeking the health benefits of this saline lake. Learn about this unusual spot with Josh and Chuck.

June 28, 2012

Depending on who’s in office, they’re either a presidential tradition or the acts of a despot. Executive orders are not spelled out in the Constitution, yet every president has issued them. Learn about these controversial edicts with Josh and Chuck.  

June 28, 2012

Depending on who’s in office, they’re either a presidential tradition or the acts of a despot. Executive orders are not spelled out in the Constitution, yet every president has issued them. Learn about these controversial edicts with Josh and Chuck.  

June 26, 2012

Studies find that absolutely everyone lies – some have found as much as a quarter of our daily interactions involve lies. What gives with everyone fudging? Chuck and Josh explore the philosophy, psychology and reality of lying and what constitutes liar.

June 21, 2012

Every once in a while Chuck and Josh do things by the numbers and here’s a good example. Turns out a surprising amount of ubiquitous items in our everyday lives were stumbled upon by accident. This episode explores a few of the more noteworthy ones.

June 19, 2012


Icebergs: floating chunks of ice. True, but whoa there. Scientists are learning that there’s a lot more to icebergs. Appropriately enough, we’ve only come to understand the tip of the iceberg and recent research shows there’s plenty more to uncover.

June 14, 2012

Along with the hole in the ozone layer, acid rain was one of the first international environmental threats. It’s fallen to the wayside in the face of climate change, but we have yet to lick it. Join Chuck and Josh as they revive the 80s drumbeat.

June 12, 2012

The concept of fighting unhealthy behavior like overeating by taxing unhealthy food has been around since 1994. But as the debate over a fat tax rages on in the U.S., Europe has begun to institute them and there’s talk of taxing overweight people as well.

June 7, 2012

In the 1980s, IBM mathematician Benoit Mandelbrot gazed for the first time upon his famous fractal. What resulted was a revolution in math and geometry and our understanding of the infinite, not to mention how we see Star Trek II.

June 5, 2012

Think you have moss figured out? You probably don’t. Join Josh and Chuck as they explore some of the surprising aspects of these most ancient and important plants on the planet.

May 31, 2012

If you’ve seen the movie Magnolia, you’ve seen what it looks like to rain frogs. While there are reports of frogs, fish and even squid raining down that are questionable, science has figured out how it can – and does – rain frogs sometimes.

May 29, 2012

The disturbing trend of school shootings around the world has dragged violence in video games into the hot seat. But are violent video games actually more capable of producing real violence in gamers or is it just the latest victim of societal hysteria?

May 24, 2012

We’ve all been brought up to keep our eyes on the prize and our pedal to the medal when we go for that brass ring, but does the Western interest in goals verge on an insane obsession? Learn how goals work (and if they’re healthy) with Chuck and Josh.

May 22, 2012

Yes, it’s true: Unions have a shady mob-related past and were originally championed by anarchists. Born from medieval trade guilds, these organizations also helped grow the American economy, and not only protected but established workers’ rights.

May 17, 2012

What will the Earth be like in 5,000 or 50,000 years? In this far-sighted episode, Josh and Chuck explore how Earth may change over time. Listen in to learn more about humanity’s odds of survival — and how technology just might save us.

May 15, 2012

Interpol is an international police agency that helps other law-enforcement agencies track criminals who operate across national borders — but how does it work, exactly? Join the guys as they delve into the world of global law enforcement.

May 10, 2012

Shotgun houses are iconic pieces of American architecture: they’re long, narrow, and filled with artistic flourishes. But where did they come from? In this episode, Chuck and Josh explore the mysterious origins of shotgun houses.

May 8, 2012

Today nutmeg is commonplace, but this wasn’t always the case. In the 17th century, the Dutch and the British fought a trade war over nutmeg. Join Chuck and Josh as they travel across continents and centuries to trace the story of nutmeg and Manhattan.

May 3, 2012

When the Visigoths ruled Spain, they introduced the idea of battling bulls at festivals. Today matadors get paid $100,000 and perform in front of 50,000 fans. But is bullfighting an antiquated, abusive relic or a cultural tradition above reproach?

May 1, 2012


Sure animals talk in their own way, with chirps and grunts and the like, but only humans can form words. It is this, some evolutionary psychologists contend, that is what truly separates us from the rest of the species on the planet. But why us?”

April 26, 2012

Some quarters of the medical establishment endorse it, others abhor it. The DEA is cracking down on it, but the Veterans’ Administration supports it as a treatment for soldiers. Medical marijuana is indeed a contentious issue. Learn all about it here.

April 24, 2012

You know how when you fly in an airline you usually don’t die? You can thank the battalion of air traffic control professionals who studiously track every moment of your flight to ensure its safety. Learn all about this unsung field with Chuck and Josh.

April 19, 2012

Do you know that up until July 2011 an ambitious hacker with a good software program could deduce your social security number based on your date and place of birth? In this episode, the boys examine some of the lesser-known details of the Social Security system in the U.S.

April 19, 2012

Do you know that up until July 2011 an ambitious hacker with a good software program could deduce your social security number based on your date and place of birth? In this episode, the boys examine some of the lesser-known details of the Social Security system in the U.S.

April 17, 2012

Despite its embattled status as brutal and illegal, commercial whaling is a tradition that dates back 1,000 years and served as the economic engine of the Industrial Revolution. Join Josh and Chuck as they explore the whaling life then and now.

April 11, 2012

Chuck and Josh end up making reduxes of past episodes on things like sweating and deodorant in this all-new episode on the science beneath what makes people smell. Learn all about your odor in this episode of Stuff You Should Know.

April 10, 2012

While the search for Atlantis has been pushed to the fringes since the 19th century, archaeologists have quietly pursued cities that may have inspired Plato to fabricate the mythical city. It looks like a team in Greece has found it.

April 5, 2012

At long last, Josh and Chuck take on perhaps their most important topic ever. Learn about the history of beer, how it’s made — the whole shebang, basically — in this watershed episode of Stuff You Should Know.

April 3, 2012

There’s no denying that diamonds are pretty — but where do they come from, and why are they so expensive? Join Chuck and Josh as they explore everything about diamonds, from their formation to the mining process and the history of the DeBeers cartel.

March 29, 2012

Today music sampling is a common practice, especially in electronic or hip-hop music. But how does it work? After all, other artists made the original music, and most of them would presumably like to be paid. Tune in to learn more about music sampling.

March 27, 2012

Who doesn’t love a good story about comeuppance? Whether served cold or piping hot, revenge is an ancient idea — and history is filled with acts of vengeance. Join Josh and Chuck as they trace the concept of revenge from the bygone days of Hammurabi to the modern era.

March 22, 2012

Tipping is commonly expected in some places, such as U.S. restaurants. Yet this practice varies across cultures. Join trivia gurus (and former waiters) Josh and Chuck as they take a closer look at the history, practice and controversy surrounding tipping.

March 20, 2012

Although you might not be a fan of comic books, there’s no denying that they have a fascinating place in American history. And — as if that wasn’t interesting enough — Josh and Chuck decided to break down the story of comic books live at SXSW.

March 20, 2012

Although you might not be a fan of comic books, there’s no denying that they have a fascinating place in American history. And — as if that wasn’t interesting enough — Josh and Chuck decided to break down the story of comic books live at SXSW.

March 15, 2012

Did they or didn’t they? There is plenty of written evidence that the ill-fated Donner Party resorted to cannibalism – except there are no bones. Learn the details of one of the worst disasters of the early West in this episode of Stuff You Should Know.

March 13, 2012

If you’ve got half a heart it’s an easy question to answer. But if you’re happy living without polio and hepatitis B you may want to question further. Learn about what makes chimps special and the history of medical testing in this episode.

March 8, 2012

Stories of a great flood and a man who managed to stay afloat while the world drowned abound in ancient traditions. Join Josh and Chuck as they explore the possible evidence of the Great Flood and whether Noah really existed.

March 6, 2012

Pretty much everything you know about duels is true – it’s a challenge to violence to defend honor. But did you know the U.S. Navy used to publish detailed guidelines in its midshipmen’s handbook? Learn all there is to know about dueling in this episode.

March 1, 2012

SETI stands for ‘search for extraterrestrial intelligence,’ and the term is used to describe both the SETI institute and the search for alien life in general. In this spaced-out episode, Josh and Chuck explore the origin, aims and challenges facing SETI.

February 28, 2012

You probably did it around 70 times last year, yet you probably don’t understand the psychological and physiological processes at work when you cried. Don’t feel bad – no one does. Join Chuck and Josh as they poke around your tear ducts in this episode.

February 23, 2012

Avoiding food for religious or health reasons has been around for millennia. But while God may appreciate the sacrifice, how does it affect the body? Join Josh and Chuck to find if fasting actually can be healthy or if it’s as bad an idea as it sounds.

February 21, 2012

Psst. You want to know how governments and corporations get the drop on one another? The frontline of intelligence is populated by spies. Learn about how spies get and transfer information (and why they do it) in this episode of Stuff You Should Know.

February 16, 2012

In the 400th episode of Stuff You Should Know, Josh and Chuck take a trip through the morgue and look over the shoulders of the often controversial coroners and medical examiners that open cadavers to determine how someone died. 

February 14, 2012

Few numbers have as storied a past as zero. Even fewer have had as great an impact on our ability to understand our universe. Yet zero is a relatively recent arrival in math. Find out all about this surprisingly fascinating number with Chuck and Josh.

February 9, 2012

Coral reefs are the largest organic structures on Earth, yet they’re created through a symbiotic relationship between creatures about 3 millimeters long. Learn more about the the world’s coral reefs (and how to protect them) in this episode.

February 7, 2012

There aren’t many criminal pursuits that are as storied as pickpocketing, and some people fondly reminisce over its heyday. Learn why some consider pickpocketing an art form, how to protect yourself from this art and more in this episode.

February 2, 2012

In a desert in Texas a 200-feet-tall clock is being constructed deep inside a mountain. Once completed, it will keep time for the next 10,000 years, even if there are no humans around to use it. Tune in as Chuck and Josh get to the bottom of the Long Now.

February 2, 2012

In a desert in Texas a 200-feet-tall clock is being constructed deep inside a mountain. Once completed, it will keep time for the next 10,000 years, even if there are no humans around to use it. Tune in as Chuck and Josh get to the bottom of the Long Now.

January 31, 2012

For thousands of years, humans have used hallucinogenic mushrooms for spiritual reasons. Today, however, having them can get you thrown in prison. How do magic mushrooms do what they do? Can they help the mentally ill? Find out in this far out episode.

January 26, 2012

Floods happen when more water is introduced to an area than can be quickly removed. That’s about it, but there’s more to floods, what causes them and the havoc they can wreak. Join Josh and Chuck in this super-saturated episode of Stuff You Should Know.

January 24, 2012

Despite worldwide prohibitions, slavery still exists. Slaves are forced or coerced into prostitution or made to work in deplorable factory conditions. Yet there’s still debate over how widespread the problem is. Learn about modern slavery in this episode.

January 19, 2012

Perhaps it’s the colorful masks or the high-flying, rapid-fire acrobatic moves. Whatever it is, there’s something uniquely and particularly entrancing about Mexican wrestling, called lucha libre. Learn more about lucha libre in this episode of SYSK.

January 17, 2012

You know those trails that jets leave in the sky? While science has explained why they happen, plenty of conspiracy theorists believe there’s more to it. Join Josh and Chuck as they channel the guys from Stuff They Don’t Want You to Know in this episode.

January 12, 2012

There’s roughly 500,000 squares miles encompassed in a triangle with points in Miami, Bermuda and San Juan. There shouldn’t be anything different about this area, but some people believe it’s a hotbed of supernatural activity. Tune in to learn why.

January 12, 2012

There’s roughly 500,000 squares miles encompassed in a triangle with points in Miami, Bermuda and San Juan. There shouldn’t be anything different about this area, but some people believe it’s a hotbed of supernatural activity. Tune in to learn why.

January 10, 2012

The answer is yes, but there’s a lot more to traveling to the southernmost continent. Learn why emperor penguins don’t make eye contact with humans, which country has the best research station and why the chances of your ship sinking are alarmingly high.

January 5, 2012

When Howard Carter opened Tutankhamen’s tomb, some believe he unleashed a curse on everyone associated with his expedition. But there’s no such thing as a curse, right? Learn the scientific basis beneath King Tut’s curse as Chuck and Josh Meet the Mummy!

January 5, 2012

When Howard Carter opened Tutankhamen’s tomb, some believe he unleashed a curse on everyone associated with his expedition. But there’s no such thing as a curse, right? Learn the scientific basis beneath King Tut’s curse as Chuck and Josh Meet the Mummy!

January 3, 2012

You may have played with a yo-yo before — perhaps you’ve even walked the dog — but do you know about the physics behind what makes a yo-yo sleep and wake up? Learn all about inertia, angular momentum and the history of the yo-yo in this episode of SYSK.

December 29, 2011

There’s a 98 percent chance you’re drinking coffee right now. Maybe not, sure, but coffee is ubiquitous – about 80 percent of Americans consume coffee and Brazil alone has 3 billion coffee plants. Learn all about the great black brew in this episode.

December 29, 2011

There’s a 98 percent chance you’re drinking coffee right now. Maybe not, sure, but coffee is ubiquitous – about 80 percent of Americans consume coffee and Brazil alone has 3 billion coffee plants. Learn all about the great black brew in this episode.

December 27, 2011

Chuck and Josh test the limits of their decorum as they explore the physiology of an orgasm. Learn all about this inexplicably taboo subject (including how even women who are paralyzed can experience orgasms) in this episode of Stuff You Should Know.

December 22, 2011

Have you ever wondered why the poinsettia is the official plant of Christmas or why we hang stockings by the chimney with care? Join Chuck and Josh for this very special Christmas episode. Who knows, maybe even St. Nick will make an appearance (he doesn’t).

December 22, 2011

Have you ever wondered why the poinsettia is the official plant of Christmas or why we hang stockings by the chimney with care? Join Chuck and Josh for this very special Christmas episode. Who knows, maybe even St. Nick will make an appearance (he doesn’t).

December 20, 2011

Lt. John Pike of the Davis, Calif., police department brought the wrath of the Internet on himself when he casually doused peaceful protestors with pepper spray. Find out what was in the can in this eye-watering episode of Stuff You Should Know.

December 15, 2011

Earthworms come in a wide range of sizes: The average U.S. earthworm is 6 to 11 inches long, and the giant worms of Australia and South America can grow to a length of 11 feet. Join Josh and Chuck as they burrow into the weird world of earthworms.

December 13, 2011

If you’re accusing someone of disloyalty or subversion without decent evidence, then you may be guilty of McCarthyism. In this episode, Josh and Chuck explore the origin of the term, starting with the infamous Communist-hunting Senator Joseph McCarthy.

December 8, 2011

The digestive system uses mechanical and chemical processes to absorb and transport all the nutrients your body needs to survive — but how does it work? In this episode, Josh and Chuck take you through all 30 feet of the average digestive system.

December 6, 2011

Benjamin Franklin first came up with daylight saving time in 1748, and people still practice it today. But how does it work? What are the pros and cons? Join Josh and Chuck as they turn back the clock to explore the origins of daylight saving time.

December 1, 2011

Sure we take it for granted the elephant represents the Republican party and the donkey Democrats, but have you ever wondered why? Josh and Chuck explore the foundation of these bizarre political symbols in this old-timey episode of Stuff You Should Know.

November 29, 2011

Chuck and Josh take a stab at answering the age old question of whether cash or plastic is the best choice for paying your way through life. Join them as they look at shopping, theft, security and the heartbreak of overdraft fees in this episode.

November 24, 2011

It’s been just 300 years since the Thoroughbred breed has been around, but it has produced some of the most storied animals humans have ever loved. Chuck and Josh dive into what makes these horses special and the controversy around racing them.

November 22, 2011

Sure, they look cool. It’s as if someone put a bow and a rifle together, but in fact crossbows predate firearms by a few thousand years. Learn all about the advantages crossbows bestow, the physics behind them and how to use one with Josh and Chuck.

November 17, 2011

As you might imagine, the President of the United States doesn’t fly coach. But what exactly does he use when traveling from point A to point B, and how does it actually work? join Josh and Chuck as they demystify Air Force One.

November 15, 2011

Sure, you’ve heard stories about Alcatraz. From high-profile escape attempts to tales of notorious inmates, the Rock is unique in American history. But how did it actually work? Join Josh and Chuck as they explain the Stuff You Should Know about Alcatraz.

November 10, 2011

The first televised Presidential debate had some odd results: The radio audience tended to believe Nixon won, while television viewers supported Kennedy. Today, debates continue weld an enormous influence on public opinion. But how do they work?

November 8, 2011

Should a company be able to own the rights to something found inside your own body? In this episode, Chuck and Josh delve into the complicated, controversial world of gene patents. Tune in to learn more about the history — and future — of gene patents.

November 3, 2011

The pre-colonial range of the American bison stretched from Canada to Mexico. From 1820 to 1880, the population dwindled from 30 million to just over 1,000. Join Josh and Chuck as they explore how bison were brought back from the verge of extinction.

November 1, 2011

The autobahn has an international reputation, and people around the world love the notion of driving on a road with no speed limits — but how true is this reputation? Join Josh and Chuck as they tell you everything you need to know about the autobahn.

October 27, 2011

It’s Halloween again, and this year Chuck and Josh are ringing in the holiday with a special reading of the short story “Berenice,” by Edgar Allan Poe. Tune in to catch Stuff You Should Know’s Poe-rific Halloween episode.

October 25, 2011

There may be a Bizarro World in our universe. Every particle has a mirror image with a reverse electrical charge, and when these opposites meet an energy transfer 300 times stronger than nuclear fusion occurs. Could this reaction power spacecraft?

October 20, 2011

If you live in a place where privacy is protected, the legal system keeps prying eyes from your personal information. But does that privacy extend beyond death?  That depends. Tune in to learn more.

October 18, 2011

The Nile River has been flowing south to north for about 30 million years, and the human race’s cradle may have been along the Blue Nile stemming from Ethiopia. Find out some amazing facts about what may be the world’s most important river.

October 13, 2011

In the 19th century, typhoid was considered a disease of the lower classes. When an outbreak occurred in wealthy Oyster Bay, New York, a mystery was afoot. Tune in to learn how this event began an ongoing debate over public safety versus civil rights.

October 11, 2011

Few riots can be attributed to passing fashions, but zoot suits are top among them. After originating among the Harlem Renaissance crowd, the zoot suit came to symbolize political defiance. Find out why it’s still illegal to wear a zoot suit in L.A.

October 6, 2011

Since its inception, the Peace Corps has sent 200,000 members to 193 countries to deliver aid and good will through know-how rather than direct funding. Learn about the successes, criticisms and dangers of the Peace Corps in this gung-ho episode of SYSK.

October 4, 2011

When the Japanese invaded Southeast Asia in World War II, they cut off America’s rubber supply. Luckily, American can-do created a synthetic rubber and saved the War. Learn about the inventor, fluid chemistry and more in this episode of SYSK.

September 29, 2011

Thought Chuck and Josh had already covered every law enforcement agency? Think again. The Marshals Service is the oldest law enforcement branch in the land, dating back to 1789. Listen up for how to get a free ride courtesy the Marshals in this episode.

September 27, 2011

Houdini suggested that sword swallowing was merely a trick. But there’s no sleight of hand or throat to this ancient practice. Practitioners really do swallow swords, car axles and more. Learn more about sword swallowers in this gag-reflexive episode.

September 22, 2011

After 800 years of creating coats and crests, some meaning has been lost to history, but much has been retained and is still in use. Find out what a mullet on field argent with stags rampant means in this Olde English episode of Stuff You Should Know.

September 20, 2011

Over the course of our lives, 80 percent of us will experience acne. Ultimately, acne comes down to one thing, a blockage in the sebaceous gland. Learn what makes a blackhead black, and everything else about zits, in this pus-filled episode of SYSK.

September 15, 2011

Did you know that science still doesn’t know the exact origin of the moon? Do you know how the moon creates high and low tides? Do you know the difference between a waxing crescent and a waning gibbous? You will after listening to this riveting episode.

September 13, 2011

Gambling predates the written word; dice made of bones have been discovered at prehistoric sites. Today, the concept of amassing a fortune in moments remains attractive. Join Josh and Chuck as they take a look at the games and the glitz of casinos.

September 8, 2011

The World Trade Center was once a global symbol of progress. Since the attacks of Sept. 11, the area has undergone a massive rebuilding process. Chuck and Josh take a look at the World Trade Center, its memorial and its symbolism in this special episode.

September 6, 2011

Over the centuries, some scientists have concluded that the best test subject is looking at them in the mirror. Join Josh and Chuck as they explore 10 researchers, unsung or otherwise, who put their own health second to the advancement of science.

September 6, 2011

Over the centuries, some scientists have concluded that the best test subject is looking at them in the mirror. Join Josh and Chuck as they explore 10 researchers, unsung or otherwise, who put their own health second to the advancement of science.

September 1, 2011

Instead of actually detecting lies, polygraph machines sense physiological variations, ostensibly brought on by guilt. The results are subject to interpretation, and therefore controversial. Join Josh and Chuck as they investigate the polygraph.

August 30, 2011

In 1964 The Prospect of Immortality laid out a plan for placing humans in suspended animation. The first person was placed in cryonic suspension three years later. But how does it actually work? Learn more about cryonics in this chilly episode of SYSK.

August 25, 2011

Cheese is often overlooked as a one of humanity’s great achievements. Making cheese is surprisingly easy: It’s been accidentally created by more than one culture at different times. Tune in to learn more about cheese — and enjoying it — in this episode.

August 23, 2011

Up to 24 million people worldwide have schizophrenia. Despite the vast amounts of research, the disorder remains mysterious. In this episode, Josh and Chuck delve into the nature of schizophrenia, from the history of the disorder to the latest research.

August 18, 2011

The U.S. Government’s Consolidated Terrorist Watch List keeps track of people who are known or suspected terrorists. But what how do people end up on it, and what happens if your name is similar to a suspected terrorist? Tune in to find out.

August 16, 2011

Years back, Josh recorded this show without Chuck, and the old version’s omitted facts bugged him. In this new version, the pair delve into the people, science and rocket tests behind Murphy’s Law. Join Josh and Chuck for this properly-executed episode.

August 16, 2011

Years back, Josh recorded this show without Chuck, and the old version’s omitted facts bugged him. In this new version, the pair delve into the people, science and rocket tests behind Murphy’s Law. Join Josh and Chuck for this properly-executed episode.

August 11, 2011

The response to humor starts with electrical activity, potentially translating to physical responses that make up laughter. Science still can’t pin down what makes one thing amusing and another not (which is pretty funny). Tune in to learn more.

August 11, 2011

The response to humor starts with electrical activity, potentially translating to physical responses that make up laughter. Science still can’t pin down what makes one thing amusing and another not (which is pretty funny). Tune in to learn more.

August 9, 2011

It’s tough to predict the future. Instead, the future looks a lot like it does now: Faster data transfer rates, more social networking, ubiquitous mobile devices — and possibly dumber people from using all this stuff.

August 4, 2011

In 1820, most of the drugs listed in the American Pharmacopoeia were plant-based; by 1960, it was a mere 5 percent. Yet in the late 20th century this trend reversed. Why? Join Josh and Chuck as they get to the root of ethnobotany and plant-based medicine.

August 2, 2011

A condition known as chromhidrosis can be jarring: The sufferer excretes colored sweat from the eccrine or the apocrine sweat glands. Join Josh and Chuck as they explore this somewhat understood, but still bafflingly mysterious medical condition.

July 28, 2011

SPAM is a canned meat product made from pork shoulder and ham. First introduced in 1937, this iconic food has spread to stores across the world. But what exactly is it, how did it get here — and why is its shelf life “indefinite?” Tune in to find out.

July 26, 2011

Wildfires consume an annual average of 5 million acres in the US. But what causes wildfires? How do they become so powerful? More importantly, how do we fight them? Join Josh and Chuck as they take you to the frontlines of the fight against wildfires.

July 21, 2011

While it’s kind of perverted in the West, the concept of karma is a central tenet of several Eastern religions. Karma isn’t just good or bad — it’s a natural law. Join Josh and Chuck to learn more about karma in this religiously respectful episode.

July 19, 2011

You smile because you’re happy, yet happiness research suggests the opposite can also hold true. Smiling may actually improve your mood. Open interpretation make for the best SYSKs, so prepare for an old-fashioned academia studyfest with Chuck and Josh.

July 14, 2011

What makes America unique? In the second segment of this special two-part episode, Josh and Chuck join up with guests from The Daily Show and The Onion to take a closer look at the Stuff You Should Know About America.

July 12, 2011

What makes America unique? In the first segment of this special two-part episode, Josh and Chuck join up with guests from The Daily Show and The Onion to take a closer look at the Stuff You Should Know About America.

July 7, 2011

There’s no question that human cannonballs are daredevils. They pack themselves into the confines of huge cannons, which shoot them into the air. But how does it work? Join Josh and Chuck to learn more about the bizarre performances of human cannonballs.

July 7, 2011

There’s no question that human cannonballs are daredevils. They pack themselves into the confines of huge cannons, which shoot them into the air. But how does it work? Join Josh and Chuck to learn more about the bizarre performances of human cannonballs.

July 5, 2011

Hate is generally defined as an extreme hostility to something or someone, usually stemming from fear, anger or a sense of injury. But how does it work? Join Josh and Chuck as they dig into the nature of hate.

June 30, 2011

John Billington didn’t just sign the Mayflower Compact — he was also the colony’s first criminal, and had the dubious honor of being the first European to be convicted of murder in this new place. But how did it happen? Tune in to find out.

June 28, 2011

There may be trillions of dollars’ worth of resources in asteroids, and some scientists believe we could mine nearby asteroids. Join Josh and Chuck as they explore how asteroid mining might work (and why we haven’t done it yet).

June 23, 2011

Although U.S. museum collections are rife with counterfeits, shrunken heads are far from fiction. The Shuar tribe of Ecuador has shrunken heads for centuries.  Learn the methodical process of shrinking a head and how they’re used in this episode.

June 21, 2011

It 1981 the first modern suicide bomber blew himself up. But this was by no means the first suicide bombing. Israeli psychologists evaluated the motivations of suicide bombers and found a number of commonalities. Join Josh and Chuck to learn more.

June 16, 2011

Alternately hailed a crucial part of the human condition or accused of killing cats, curiosity remains a subject of debate among researchers. Where does it come from? How does it work? Join Chuck and Josh as they explore the mysterious roots of curiosity.

June 14, 2011

Military snipers always work in pairs, and they’re called force multipliers because of the profound effect a two-man team can have on a rival military. But how do they work? Join Josh and Chuck to learn more about snipers.

June 9, 2011

Thomas Malthus concluded that humanity is bound to outgrow Earth’s carrying capacity. The prediction was based on humanity’s exponential growth and the linear growth of the food supply — but was he correct? Tune in to find out.

June 7, 2011

As early as 1786, groups assembled to help slaves escape lives of bondage. And, as the 19th century progressed, the emergent Underground Railroad grew more sophisticated in aiding escaped slaves. But how did it work? Join Josh and Chuck to learn more.

June 2, 2011

Fear results from your brain’s reaction to a stressful stimulus, and — though it may be unpleasant — it plays a crucial role in the life of every human being. But how does it work (and why)? Join Josh and Chuck as they explore the sensation of fear.

May 31, 2011

Sure, nicotine doesn’t cause cancer, but it does rearrange the brain’s reward system. Humans have been ingesting this plant for more than 6,000 years, but we generally understood little of it. Join Chuck and Josh as they explain how nicotine works.

May 26, 2011

Whether through revolution, colonization or other means, every country has its start somewhere. But how does the process work? Join Josh and Chuck as they explain how countries get created — and why some countries aren’t always recognized by others.

May 24, 2011

Terror management theory isn’t about mid-level bureaucrats in Al-Qaeda — so what exactly is it, and what does it say about human culture and our perception of mortality? Join Chuck and Josh as they explore the implications of terror management theory.

May 19, 2011

In the process of parallel evolution, two seemingly unrelated species living in isolation can evolve surprisingly similar traits — but how does it work, and why does it happen? Join Chuck and Josh as they break down the process of parallel evolution.

May 17, 2011

Could the sun, typically known for providing light and warmth, kill us? The Apollo 17 mission almost resulted in tragedy due to a mega-flare — and astronauts aren’t the only ones at risk. Join Josh and Chuck to learn more about the sun.

May 12, 2011

They say you can’t con an honest man, and that’s key to thwarting cons; if it sounds too good to be true, it probably is. Learn how to avoid everything from small-time scams to the Nigerian money transfer in this captivating episode with Chuck and Josh.

May 10, 2011

Mountaintop removal mining is (to say the least) a controversial practice. But what exactly is it, how does it work and — most importantly — why should you care? Listen in to learn more about the effects of mountaintop removal mining.

May 5, 2011

How does memory work? How is internet access changing the function of the human brain? In this podcast, Josh and Chuck take a closer look at the science behind memory — and how modern technology may be changing it.

May 5, 2011

How does memory work? How is internet access changing the function of the human brain? In this podcast, Josh and Chuck take a closer look at the science behind memory — and how modern technology may be changing it.

May 3, 2011

The art of parkour is an astonishing combination of agility and physical strength pursued across the world — but how does it work? Join Josh and Chuck as they explore the philosophy, history and pursuit of this unique form of artistic expression.

April 28, 2011

Whether you’re a rollercoaster fan or avoid them like the plague, there’s no denying that these contraptions are striking examples of physics at work. So how do they actually work? Join Josh and Chuck as they break down the mechanics of rollercoasters.

April 26, 2011

Historically speaking, decapitation was a popular means of execution — it’s been used by everyone from ancient Romans to French revolutionaries. But is there any truth to claim that victims retain their consciousness? Tune in to learn more.

April 21, 2011

Whether it’s oral, scrawled in blood or signed on a deathbed everyone should have a will. But how do they actually work? Join Chuck and Josh as they explain that “of sound mind” thing in this episode on wills.

April 19, 2011

Flies: They’re disgusting, disease-spreading flying machines. They’re also really fascinating. Flies taste with their feet, smell with their antennae and use a pair of eyes as a compass oriented to sunlight. Listen in to learn more.

April 14, 2011

During the 1930s-80s, the work of directors operating in the shadows of Hollywood led to explorations in sexuality and violence that mainstream cinema wouldn’t touch. Join Chuck and Josh as they explore the seedy underbelly of grindhouse flicks.

April 12, 2011

After botching a particularly tricky dish, molecular chemist Herve This decided to figure out why his recipe didn’t work. He ended up creating a new field of cuisine: Molecular gastronomy. Join Josh and Chuck as they explore this new frontier of cooking.

April 7, 2011

In an uncertain economy, investors often flock to commodities like oil, trading oil futures in a derivative market. Some believe this creates an artificially high price. Join Josh and Chuck and learn if this market is responsible for inflating gas prices.

April 5, 2011

Pop quiz: What word denotes a nation of people, a last name and an occupation? If you guessed ‘Sherpa,’ then congratulations: You’re correct. But what exactly is a Sherpa? Tune in and learn more as Chuck and Josh explore the culture of the Sherpa people.

March 31, 2011

In this episode, Josh and Chuck ditch the studio and head west — south by southwest, in fact — to record a live podcast in Austin, Texas. Tune in and learn more Stuff You Should Know about SXSW and UFOs.

March 29, 2011

Igloos were traditionally used by Inuit Indians as temporary shelter while on hunting and fishing trips. In this episode, Josh and Chuck look at the design of igloos, from their impressive heat-catching properties to their ingenious construction.

March 24, 2011

Due to a condition known as Thomsen’s disease, the muscles of fainting goats tense up whenever the animal is startled. In this episode, Josh and Chuck break down the science behind this bizarre condition. Tune in and learn more.

March 22, 2011

The recent disaster in Japan has caused massive damage and killed thousands — but that’s not all: The Fukushima nuclear plant may possibly be on the verge of a meltdown. Tune in to learn how meltdowns work, and what a meltdown would mean for Japan.

March 17, 2011

Freegans prefer scavenging, volunteering and squatting to the more mainstream consumer practices of buying, working and renting a home. But how does this actually work, and why are these people sometimes called ‘Dumpster divers?’ Tune in to find out.

March 15, 2011

A mummy is a human being whose soft tissue has been preserved after death, and there are mummies around the world — including natural mummies, as well as corpses that have been intentionally embalmed. Join Chuck and Josh to learn more..

March 10, 2011

It’s a controversial idea, to say the least: If evidence shows that addicts tend to be irresponsible, abusive parents, then why should they have children at all? In this podcast, Josh and Chuck explore the practice (and legality) of sterilizing addicts.

March 8, 2011

Cults are conventionally understood to be unestablished, non-mainstream religious groups that follow a single leader. So what does it take to be the leader? Tune in as Josh and Chuck take a closer look at cults.

March 8, 2011

Cults are conventionally understood to be unestablished, non-mainstream religious groups that follow a single leader. So what does it take to be the leader? Tune in as Josh and Chuck take a closer look at cults.

March 3, 2011

A fossil is a piece of once-living organic material that has undergone a transition from an organic state to an inorganic state. But what exactly is fossilization? Listen in as Josh and Chuck break down the process of fossilization.

March 1, 2011

During World War II, the U.S. interned more than 100,000 Japanese and Japanese-American citizens. In this episode, Chuck and Josh recount the events that led to these internments, along with the long-term consequences of these events.

February 24, 2011

When high inflation, slow growth and high employment combine, they result in an unfortunate economic situation known as stagflation. But what exactly is stagflation, and how does it work? Most importantly, how can we prevent it in the future?

February 22, 2011

What’s the deal with tickling? Why does it make people laugh, and what’s the science behind the reaction? Join Chuck and Josh and listen in as they demystify the curious practice known as tickling.

February 17, 2011

Crime scene photography is a crucial aspect of forensic investigation, but it’s by no means a new part of detective work. In this episode, Chuck and Josh explore the history and modern use of crime scene photography.

February 15, 2011

Numerous television shows feature blood pattern analysis — but how do these fictional portrayals measure up to the real thing? Tune in as Chuck and Josh break down the science behind blood pattern analysis.

February 10, 2011

The Black Death was gruesome: Symptoms included tumors, purple splotches, fevers and vomiting. But how did this disease manage to spread from the Gobi desert and kill approximately one-third of the population of 14th-century Europe? Tune in and find out.

February 8, 2011

Bartering is an ancient practice. With the emergence of money-based transactions, it’s no wonder that people might think bartering is a thing of the past. Tune in to learn more about the bartering process — and where it’s still used today.

February 3, 2011

For decades, Scooby Doo has captivated children across the world. It’s been translated to multiple languages and remains as popular as newer programs. But why? Join Chuck and Josh as they shed light on the seemingly endless allure of Scooby Doo.

February 1, 2011

Why would someone fake an illness? Here’s an even better question: Why would someone repeatedly make themselves sick? Join Josh and Chuck as they separate the facts from fiction and give you the scoop on Munchausen syndrome.

January 27, 2011

It’s no secret that people in crowds will behave differently than they would if they were alone. In a riot, individuals may exhibit a drastic change in their behavior — but why? How? More importantly, how can riots be controlled? Tune in to find out.

January 25, 2011

Venom isn’t unique to snakes — animals like scorpions, spiders, jellyfish and even platypuses can all use venom. Join Chuck and Josh as they explore the world’s most venomous creatures (and break down the difference between poison and venom).

January 20, 2011

Oceans cover more than 70 percent of Earth’s surface. But could the kinetic power of the tides or the oceans’ thermal energy become the world’s future power source? Listen in as Josh and Chuck break it down.

January 18, 2011

Many people are familiar with depictions of the Mafia in film, but what’s the real story? Join Chuck and Josh as they break the infamous code of silence and shed light on some of the most dangerous and mysterious organizations in the western world.

January 13, 2011

Acupuncture is an ancient Chinese practice rooted in the precepts of Taoism, and for thousands of years it has been used to treat a range of ailments. The western world has historically dismissed this treatment — but why? Tune in and learn more.

January 11, 2011

Today every schoolkid learns a fair share of facts about clouds and the water cycle, but this wasn’t always the case. Join Chuck and Josh as they break down the history behind the classification of clouds and the way they form, all in one handy podcast.

January 6, 2011

At what point does something become an antique? Could that old piece of furniture in the attic be worth millions of dollars? Join Josh and Chuck as they break down all the Stuff You Should Know about antiques.

January 4, 2011

Since gluten is found in rye, wheat and barley grains, it’s a near-ubiquitous part of many diets. So why do some people avoid this common protein? Tune in as Josh and Chuck break down the concerns surrounding gluten.

December 30, 2010

Volcanic eruptions are destructive and often newsworthy events, but why do they occur? What are volcanoes? In this episode, Josh and Chuck take a look (but not too close) at the forces at work behind Earth’s geological “hotheads.”

December 28, 2010

Immigration systems regulate the flow of foreign immigrants into any given country. But why is immigration such a controversial topic, especially in the United States? In this episode, Josh and Chuck delve into the details and debate behind immigration.

December 23, 2010

Today, millions of people around the world are homeless. In this episode, Josh and Chuck take a look at homelessness in the United States, discussing everything from the factors that lead to homelessness to what you can do to help alleviate the situation.

December 21, 2010

Famed aviator Amelia Earheart’s disappearance in 1937 is a mystery that endures to this day. Why don’t we know what happened to her? In this episode, Josh and Chuck examine the facts and evidence behind the famous case.

December 16, 2010

Most people know what a migraine headache is — some from painful experience — but there’s a lot more to this “neurobiological condition” than an achy noggin. Josh and Chuck explore the symptoms, triggers and mysteries of migraines in this episode.

December 14, 2010

Agritourism marries farming and tourism, but why do people pay to pick apples or work on a farm? And who does agritourism benefit? Josh and Chuck explore the history and various incarnations of agritourism, as well as the rationale behind it.

December 9, 2010

Hanukkah is an eight-day Jewish holiday, but what’s it all about? And why do some people think of it as “Jewish Christmas”? In this episode, Josh and Chuck share Stuff You Should Know about Hanukkah.

December 7, 2010

Demolition and construction creates a lot of waste, so renovating your house is generally a “greener” option. In this episode, Josh and Chuck explore some green renovation and construction options.

December 2, 2010

The rules of war are agreed-upon rules that are intended to govern international wars and conflicts. Who developed these rules? And do countries really abide by them? Josh and Chuck take a detailed look at how the rules of war work in this episode.

November 30, 2010

Circumcision is a common practice in which the foreskin of a male’s penis is removed, typically as a baby. Josh and Chuck take a look at the origins, practices, and arguments for and against circumcision in this episode.

November 25, 2010

Dreadlocks are matted coils of hair that form a very distinctive (and often misunderstood) hairstyle. So what’s the deal with dreads? In this episode, Josh and Chuck examine the long history of dreadlocks and walk you through the process of dreading hair.

November 23, 2010

A majority of human cultures practice kissing in one form or another. But why do we kiss? Is the behavior instinctive or learned? In this episode, amateur philematologists Josh and Chuck take a look at the biology, sociology and pyschology of kissing.

November 18, 2010

Over a billion people do not have access to clean water, and many die from water-born diseases. With 6,000 people dying each day, this situation is increasingly urgent. Could Lifestraw filters resolve this crisis? Tune in and find out.

November 16, 2010

It’s no secret that human beings have an obsession with innovation — but has our species already found every good idea? As Josh and Chuck break down the continuing search for the next great idea, they touch on everything from hand tools to cancer cures.

November 11, 2010

These days, alcoholics and other people suffering from addictions are often sent to rehabilitation centers to kick their habit. But how long has rehab been around, and how does it work? Listen in as Chuck and Josh present the fascinating process of rehab.

November 9, 2010

Prohibition was a 13-year period in American history when selling or producing alcohol was illegal. What led to this astonishing development? Why did it end? Josh and Chuck take a look at Prohibition’s fascinating history in this episode.

November 4, 2010

Modern scientists have extensively researched addicts and the things they abuse, but we still don’t understand everything about the nature of addiction. So how does it work? Tune in to learn more about addiction (and why you can’t kick your SYSK habit).

November 4, 2010

Modern scientists have extensively researched addicts and the things they abuse, but we still don’t understand everything about the nature of addiction. So how does it work? Tune in to learn more about addiction (and why you can’t kick your SYSK habit).

November 2, 2010

When you think of animal migrations, you probably picture thousands of animals thundering across the savannah. But where are they going, and why? Josh and Chuck explain why and how animals migrate in this episode.

October 28, 2010

In this spooky episode of Stuff You Should Know, Josh and Chuck get you ready for Halloween as they narrate H.P. Lovecraft’s creepy tale “The Tomb.” Tune in to learn more…if you dare!

October 26, 2010

All of us have experienced the feeling of jealousy at some point or another. But why do we get jealous? Are women really more jealous than men? Josh and Chuck get to the bottom of jealousy in this episode.

October 21, 2010

Hallucinogenic drugs are currently illegal, but they were once commonly used in psychological treatment. In this episode, Josh and Chuck discuss the rise and fall of psychedelics in treating mood disorders — and why they’re starting to gain favor again.

October 19, 2010

In this episode, Josh and Chuck take a comprehensive look at gender identity “disorders” and the gender reassignment process.

October 14, 2010

Traditionally, house swapping involves temporarily exchanging homes with a stranger for vacation purposes. Tune in to learn more about house swapping, from the traditional version to hospitality exchanges and couchsurfing, in this episode.

October 12, 2010

Sleep is a restorative state that’s vital to human functioning — or is it? In this episode, Josh and Chuck explore different ways in which science is trying to minimize or phase out sleep, from pills to genetic research.

October 7, 2010

In medieval times, knights were warriors with specialized skills, extensive training and their own code. In this episode, Josh and Chuck discuss the rise and fall of medieval knights and finish up with a look at the modern institution of knighthood.

October 5, 2010

Polygamy, the practice of having multiple spouses, is mostly illegal in the United States but very common in other parts of the world. In this episode, Josh and Chuck discuss polygamy and touch on a host of related topics, from Mormonism to monogamy.

September 30, 2010

If you’re tone deaf, you can’t hear the difference between musical pitches and notes. And it’s probably a hereditary trait, as Josh and Chuck explain in this pitch-perfect episode on tone deafness.

September 28, 2010

Nowadays roller derby is increasingly popular across the US — but how did it get its start, and how does it work? As Josh and Chuck delve into the world of roller derby, they touch on skateboarding, women’s rights and more. Tune in and learn more.

September 23, 2010

The modern conception of hypnosis came into vogue in the late 18th century, and it’s been the subject of much debate ever since. Does hypnosis really work? How? Josh and Chuck discuss the history, practices and feasibility of hypnotism in this episode.

September 21, 2010

Whatever you call them, octopuses are amazing creatures. In this episode, octopus enthusiasts Josh and Chuck take a closer look at the unusual anatomy, unique abilities and fascinating habits of octopi.

September 16, 2010

Biospeleology is the scientific study of cave organisms and ecosystems. In this episode, amateur biospeleologists Josh and Chuck explore the dark, dank world of caves and the weird and wonderful creatures that live in them.

September 14, 2010

Whether using polished metal surfaces or clear glass, human beings have enjoyed admiring their reflections for centuries. In this episode, Josh and Chuck reflect on the types, mind-melting physics, superstitions and rather interesting history of mirrors.

September 9, 2010

Customs agencies regulate the flow of goods in and out of countries, impose duties and enforce laws. In this episode, Josh and Chuck take a look at how customs works.

September 7, 2010

Cleaning up crime scenes is a niche industry that’s both lucrative and messy. In this episode, Josh and Chuck take a look at how crime-scene clean-up works.

September 2, 2010

Established in 1998 as a way to determine college football rankings, the Bowl Championship Series (BCS) is a complex statistical system. In this episode, Josh and Chuck tackle the complex variables — and math! — behind the BCS rankings.

August 31, 2010

Cremation of dead bodies is practiced in many parts of the world, but how exactly does it work? Josh and Chuckers take you inside the crematorium as they ponder the cultural history, process and controversies of cremation in this episode.

August 26, 2010

There are lots of conspiracy theories about Freemasons, but how much do you really know about this secretive order? In this episode, Josh and Chuck take a comprehensive look at the origins, history, practices, beliefs and famous figures of Freemasonry.

August 24, 2010

Sleep behaviors are pretty fascinating. Some people snore, some grind their teeth — and some take a little stroll, or perhaps a drive. In this episode, Josh and Chuck investigate how sleepwalking, or somnambulism, works.

August 19, 2010

MARS stands for Magenn Air Rotor System, but a MARS turbine isn’t your typical windmill. It’s a blimp floating hundreds of feet in the air. Tune in as Josh and Chuck explain how this turbine works — and whether it will become the future of wind power.

August 17, 2010

Breathalyzers work on a simple principle: Alcohol is absorbed into the lungs and present in breath. But the machines that actually measure this alcohol level are really, really complicated. Tune in and learn more in this podcast.

August 12, 2010

Most people have a basic understanding of how prisons work, but it’s often heavily influenced by fiction. What’s it really like behind those bars? In this episode, Josh and Chuck reveal the practices, controversies and harsh realities of prison life.

August 10, 2010

As many as one in five houses in Vancouver, British Columbia are used to grow marijuana. Join Josh and Chuck as they step inside indoor grow houses to see what’s going on.

August 5, 2010

In this episode, Josh and Chuck hit the open road as they explore the history, allure and decline of America’s most iconic highway: Route 66.

August 3, 2010

In this episode, Josh and Chuck tackle a mind-melting topic: quantum physics! They ponder subatomic particles and quantum mechanics, focusing specifically on a thought experiment called quantum suicide.

August 3, 2010

In this episode, Josh and Chuck tackle a mind-melting topic: quantum physics! They ponder subatomic particles and quantum mechanics, focusing specifically on a thought experiment called quantum suicide.

July 29, 2010

A presidential pardon is a unique, unchallengable power granted to the president of the United States by the Constitution. In this episode, Josh and Chuck discuss the origins, history and controversial use of the presidential pardon.

July 27, 2010

It’s no surprise that ticks are one of mankind’s least favorite animals. After all, they subsist on blood and spread disease. But how much do we really know about ticks? Tune in to learn more about ticks — and how to get rid of them — in this podcast.

July 22, 2010

Although they might seem pretty mundane, saunas are surprisingly fascinating inventions. Josh and Chuck break out all sorts of sweaty, sauna-related trivia, from the Finnish affinity for saunas to sauna etiquette, in this episode.

July 20, 2010

Taste seems like a pretty simple sense, but scientists are still trying to figure out exactly how it works. Josh and Chuck explore the complexities of taste, from definitions and physiology to tongue maps and supertasters, in this episode.

July 15, 2010

James Bond, the most infamous secret agent ever to grace the silver screen, originated in the pages of British author Ian Fleming’s novels. Amateur agents Josh and Chuck uncover all sorts of Bond trivia in this action-packed episode.

July 13, 2010

A large percentage of the world’s population believes that you will be reborn after you die. So why does the concept of reincarnation seem so paranormal to Westerners? Join Chuck and Josh as they explore the ins and outs of birth, death and birth again.

July 8, 2010

Butterflies’ wings are colored as a result of iridescence; this fascinating optical phenomenon is the result of light refracting off transparent surfaces. Josh and Chuck reveal how pigmentation, iridescence, light and butterfly wings work in this episode.

July 6, 2010

Voodoo is a religion found in parts of Africa and Haiti that’s often misunderstood. In this episode, Josh and Chuck separate the faction from the fiction as they explore how Voodoo really works.

July 1, 2010

Thomas Jefferson is famous for his role in shaping the United States of America — and for creating his own, revised version of the Bible. Learn more about the Jefferson Bible in this episode.

June 29, 2010

Whether you’ve been stuck in a traffic jam or forced to merge and avoid road construction, everyone’s had a few bad experiences with traffic. But how does traffic actually work? In this episode, Chuck and Josh take a look at traffic waves (and bubbles).

June 24, 2010

In many films, hapless characters meet their untimely demise in a lethal pit of quicksand. It’s a gruesome, undignified end — but is it realistic? Josh and Chuck tackle the properties of quicksand — and how to escape it — in this episode.

June 22, 2010

In this episode, Josh and Chuck discuss the controversial “ghost prisons,” covert prisons created by the CIA after September 11th, 2001 to secretly detain and interrogate terrorist suspects in various locations around the world, including the U.S.

June 17, 2010

The Samurai were legendary Japanese swordsmen and warriors, known for their loyalty and adherence to a strict code of honor. Josh and Chuck tackle the Samurai in this episode.

June 15, 2010

The Innocence Project is an American non-profit organization whose mission is to exonerate wrongly convicted individuals and reform the legal system. Josh, Chuck and a special “guest” explain how the organization works — and why it’s necessary.

June 10, 2010

Epigenetics is a fascinating field of genetics that studies how the epigenome and environmental, nutritional and social factors affect gene expression. Josh and Chuck explain how epigenetics works in this episode.

June 8, 2010

Recently, a massive sinkhole opened up in Guatemala City, swallowing a three-story building in the process. In this episode, Josh and Chuck explore sinkholes and the forces that cause them, natural and otherwise.

June 3, 2010

Who first decided that it would be a great idea to shoot flame at other people from a distance? Josh and Chuck talk about the (very) early origins, history and technology of the flamethrower in this episode.

June 1, 2010

The modern world runs on fossil fuel, and offshore oil drilling powers a large part of the global economy. But what do we do when disaster strikes? Join Josh and Chuck as they take a look at the techniques used to clean up oil spills in this podcast.

May 27, 2010

In this episode, Josh and Chuck discuss reservoir-induced seismicity and the conditions under which human activities and projects like dams can trigger earthquakes.

May 27, 2010

In this episode, Josh and Chuck discuss reservoir-induced seismicity and the conditions under which human activities and projects like dams can trigger earthquakes.

May 25, 2010

Serial killers are notorious for their grisly crimes and disturbing behavior, but what makes a serial killer a serial killer? Josh and Chuck ponder the history, psychology and methodology of serial killing and serial killers in this episode.

May 20, 2010

Josh and Chuck talk more about their experiences in Guatemala and the amazing work that the non-profit group Cooperative for Education is doing there — and how you can help! — in part two of their Guatemala series.

May 18, 2010

Josh and Chuck share the story of their recent eye-opening trip to Guatemala, which was sponsored by a nonprofit organization called Cooperative for Education, in this very special episode of Stuff You Should Know.

May 13, 2010

Counterfeiting currency successfully takes serious skills, and some consider counterfeiting an art. Josh and Chuck recount the stories of five artful counterfeiters and their successful careers in this episode.

May 11, 2010

Twin siblings are common enough that most people know a pair or two, but why does twinning occur? Josh and Chuckers explain where twins (and babies) come from, discuss different types of twins and debunk some “twin myths” in this episode.

May 6, 2010

In general, stealing valuable items tends to be difficult and dangerous, but stealing works of art can be surprisingly easy. In this episode, Josh and Chuck cite recent art heists as they discuss why stealing art is relatively easy.

May 4, 2010

Most people are familiar with the plastic, interconnecting bricks called LEGO bricks, but what’s their story? In this episode, Josh and Chuck discuss the history, popularity and trajectory of LEGOS — and throw out some serious stats along the way.

May 4, 2010

Most people are familiar with the plastic, interconnecting bricks called LEGO bricks, but what’s their story? In this episode, Josh and Chuck discuss the history, popularity and trajectory of LEGOS — and throw out some serious stats along the way.

April 29, 2010

As far as sports go, cliff diving doesn’t require much equipment. It does, however, require a certain amount of chutzpah, a dash of derring-do, and a deep body of water. Tune in and learn more about cliff diving in this podcast.

April 27, 2010

When you hear the word ‘genius,’ names like Einstein and Hawking probably spring to mind. Defining exactly what makes them geniuses, however, is much more complicated. Josh and Chuck discuss the many theories about genius in this episode.

April 22, 2010

People with a condition known as mirror-touch synesthesia literally feel the pain of others — but why? Josh and Chuck trace the cause of this condition to one culprit: the mirror neuron. Tune in to learn more about mirror neurons and neuroscience.

April 22, 2010

People with a condition known as mirror-touch synesthesia literally feel the pain of others — but why? Josh and Chuck trace the cause of this condition to one culprit: the mirror neuron. Tune in to learn more about mirror neurons and neuroscience.

April 20, 2010

There are less than a hundred documented cases of people who cannot feel pain and suffer from a condition called congenital insensitivity to pain. Josh and Chuck discuss the dangers and symptoms of CIP and related disorders in this episode.

April 16, 2010

In this episode, Josh and Chuck discuss the most famous fortified structure in the world — the castle. Tune in to learn all about castles, from murder holes to modern fortresses.

April 13, 2010

Gilles de la Tourette syndrome, commonly referred to as Tourette’s, is a neurological disorder characterized by a combination of verbal and physical tics.

April 8, 2010

Zoos are popular because they allow visitors to see wild animals from all around the world, but how does living in captivity affect the animals? In this episode, Josh and Chuck discuss the pros and cons of zoos.

April 6, 2010

Josh and Chuck discuss the problem of desertification, from what causes serious degradation of dryland ecosystems to possible ways to repair the damage, in this episode.

April 1, 2010

McDonald’s is arguably the most famous fast food restaurant on the planet. Join Josh and Chuck as they discuss the humble beginnings, menu items, practices and controversies of the fast food giant in this episode.

March 30, 2010

In this episode, Josh and Chuck discuss the many theories behind the mysterious phenomenon of hiccups, how long hiccuping bouts can last, and various “remedies” for hiccups.

March 25, 2010

Josh and Chuck tackle taxidermy, the practice of preserving and mounting dead animal skins for display, in this episode.

March 23, 2010

In this episode, Josh and Chuck discuss the origins, philosophies and practices of urban planning.

March 18, 2010

Vikings were fierce, plundering Scandinavian warriors; and even today, their reputation precedes them. Josh and Chuck investigate what the Vikings were really like in this episode.

March 16, 2010

In this episode, Josh and Chuck discuss the history, practices and controversies of lotteries.

March 11, 2010

Fascism is a specific political philosophy that’s often mistakenly used to describe any authoritarian, supressive movement or regime. Josh and Chuck discuss the origins, history and markers of Fascism in this episode.

March 4, 2010

Scabies is a contagious skin disease with a bad reputation. Tune in as Josh and Chuck discuss this itchy condition — from the mite that causes it to common cures — in this episode.

March 4, 2010

Scabies is a contagious skin disease with a bad reputation. Tune in as Josh and Chuck discuss this itchy condition — from the mite that causes it to common cures — in this episode.

February 25, 2010

In part two of their series on bail, Josh and Chuck talk about bail enforcement agents, a.k.a. bounty hunters.

February 23, 2010

Bail is a centuries-old practice that allows defendants in criminal cases to be released from jail until their trial convenes. Learn more about the origins of bail and modern bail practices in this episode.

February 18, 2010

Chuck and Josh discuss five of the most bizarre government experiments, from transplanted puppy heads to Cold War psychics, in this episode.

February 16, 2010

In this episode of Stuff You Should Know, Josh and Chuckers discuss the origins and practices of the Amish.

February 11, 2010

Josh and Chuck discuss the Braille alphabet — from its origins in Charles Barbier’s “night writing” system to the many Braille codes that exist today — in this episode of Stuff You Should Know.

February 9, 2010

Witches are perhaps one of the most reviled and misunderstood groups in history — but why? Join Josh and Chuck as they break down the Stuff You Should Know about witchcraft in this episode.

February 4, 2010

In this episode, amateur anthropologists Josh and Chuck discuss urban legends, from how they’re defined to some classic examples you’ve probably heard yourself.

February 2, 2010

In this episode of Stuff You Should Know, Josh and Chuck discuss SWAT teams, elite police units that are specially trained for extreme situations.

February 2, 2010

In this episode of Stuff You Should Know, Josh and Chuck discuss SWAT teams, elite police units that are specially trained for extreme situations.

January 28, 2010

In this episode, Josh and Chuck discuss whether there are any truly “undiscovered” groups of people left on the planet, the definition of undiscovered — and why groups might want to avoid modern civilization.

January 26, 2010

Ninja, Japanese warriors famous for stealth, deception and sabotage, were inspired by Chinese military philosophy. Join Josh and Chuck as they explore the origins, history, gear and popularity of the ninja in this episode.

January 21, 2010

In this disaster-themed episode of Stuff You Should Know, Josh and Chuck ponder ways the world could end — and how projects like the lunar Doomsday Ark propose to save humanity.

January 19, 2010

In this episode of Stuff You Should Know, Josh and Chuck examine the various factors that have caused honeybee populations to decline — and what you can do to help the honeybees.

January 14, 2010

In this episode of Stuff You Should Know, amateur astrophysicists Josh and Chuck break out the stats and attempt to explain the complex, boiling ball of gas that we call the sun.

January 12, 2010

Tune in as Josh and Chuck take a detailed look at organ donation — from the earliest organ transplants to the organ black market — in this episode of Stuff You Should Know.

January 7, 2010

Mercenaries are soldiers of fortune who fight in wars and conflicts for profit. Join Josh and Chuck as they explore the fascinating history of mercenaries past and present in this episode of Stuff You Should Know.

January 5, 2010

Noodling is a type of fishing in which the participant uses his or her hand in lieu of fishing gear and bait. Discover the origins and practices of this unusual “sport” in this episode of Stuff You Should Know.

December 31, 2009

Human experimentation is an age-old practice, dating back to 4 BCE. Listen in as Josh and Chuck give you the low-down on the historic, grisly underbelly of science and medicine — human experimentation.

December 29, 2009

Although today’s pirates aren’t storming the coast of Florida or other eastern states, piracy is still around in this modern age. Join Josh and Chuck as they look back at the history of piracy — and its successors — in this episode.

December 24, 2009

On Christmas eve, Josh and Chuck decide to take that ineffable Stuff You Should Know approach to the celebration known as Christmas. Join the guys as they unravel the mysterious historical roots of the holiday’s evolution in this episode.

December 22, 2009

In this episode of Stuff You Should Know, Josh and Chuck discuss the origins and complications of concussions, injuries in which the brain comes into contact with the skull.

December 17, 2009

In this episode of Stuff You Should Know, Josh and Chuck discuss kleptomania, a disorder in which people have an overwhelming impulse to steal unnecessary items.

December 15, 2009

In this episode of Stuff You Should Know, Josh and Chuck discuss Narco States, places where illegal drugs are traded openly with government approval — or without government interference.

December 10, 2009

In this episode of Stuff You Should Know, Josh and Chuck discuss the notorious Hells Angels Motorcycle Club, more commonly referred to as the Hells Angels.

December 8, 2009

In this episode of Stuff You Should Know, Josh and Chuck discuss the Large Hadron Collider, from its purpose and origins to how likely it is to wipe out all life in the universe.

December 3, 2009

The concept of a near-death experience is well-known in popular culture, but we still don’t know why these seemingly supernatural events occur. Josh and Chuck explore the myriad theories that attempt to explain near-death experiences in this episode.

December 1, 2009

Why do we crave certain foods? Does everyone experience food cravings? In this episode of Stuff You Should Know, Josh and Chuck explore the delicious topic of food cravings.

November 26, 2009

In this episode, Josh and Chuck explain the finer points of hostage negotiation, including the symbolism of hostages, the negotiator’s goals and tactics, Stockholm syndrome — and what happens when people refuse to negotiate.

November 24, 2009

In this episode of Stuff You Should Know, Josh and Chuck discuss nuclear proliferation, nuclear parity and the Cold War strategic doctrine called Mutual Assured Destruction.

November 19, 2009

The world is full of festivals, some of which are really odd. Tune in as Josh and Chuck take a playful look at ten unusual town festivals in this episode of Stuff You Should Know.

November 17, 2009

If you’ve ever wondered where the expression “low man on the totem pole” comes from, this episode of Stuff You Should Know is a must-listen. Tune in as Josh and Chuck take a look at the origins, symbolism and history of totem poles.

November 12, 2009

Population may not seem like the most scintillating topic in the world, but Josh and Chuck beg to differ. Join them as they explore how population works, from demographics to population control, in this episode.

November 10, 2009

The US and England have databases containing DNA from millions of citizens. Originally only criminals were included, but as the programs expanded many more people were added. Learn how these databases work — and why they were built — in this episode.

November 5, 2009

In this episode of Stuff You Should Know, Josh and Chuck take a look at the advertising practice of product placement, from its origins to different types to classic examples in film and television.

November 3, 2009

Some people have memories of very early childhood, but how far back can you go? Is it possible to remember your own birth? Josh and Chuck are on the case in this episode of Stuff You Should Know.

October 29, 2009

In this Halloween episode, Josh and Chuck go way back to late 19th century London to examine the grisly details of the Jack the Ripper murders. They also discuss Ripperology, Jack the Ripper suspects and theories, and the legacy of the murders.

October 27, 2009

The Witness Protection Program, or the Witness Security Program, was established in 1970 to protect government witnesses before, during and after a trial. Learn more about witness protection in this episode of Stuff You Should Know.

October 22, 2009

The Cannon Ball Run is a cross-country car race famously portrayed in the campy 1981 movie “Cannon Ball Run.” But it isn’t fictional. Tune in as Josh and Chuck take you on a wild ride through the real (and colorful) history of this infamous race.

October 22, 2009

The Cannon Ball Run is a cross-country car race famously portrayed in the campy 1981 movie “Cannon Ball Run.” But it isn’t fictional. Tune in as Josh and Chuck take you on a wild ride through the real (and colorful) history of this infamous race.

October 20, 2009

China’s one-child policy, implemented in 1979, was designed to limit population growth. In this episode of Stuff You Should Know, Josh and Chuck examine the policy’s surprising origins, impact on Chinese culture, and pros and cons.

October 15, 2009

After a night of heavy boozing, many partygoers find themselves the victim of a hangover. But what exactly is a hangover, and what causes it? Join Chuck and Josh as they break down the science behind hangovers — and how to avoid them — in this podcast.

October 13, 2009

Ever wondered about the history of your house? In this episode of Stuff You Should Know, Josh and Chuck give listeners some pointers on determining the history of a house.

October 8, 2009

Columbus is often touted as the “discoverer” of the Americas, he wasn’t the first to set foot on American soil by a long shot. Tune in as Josh and Chuck dig deep into the history — and mystery — of the first American inhabitants in this podcast.

October 6, 2009

In this final installment of their 4-part suite on health care, Josh, Chuck and Molly take a tour of health care systems around the world, from France to Switzerland.

September 29, 2009

In this third episode of Stuff You Should Know’s health care reform series, Josh and Chuck — and special guest Molly Edmonds — sort through the myths, rumors and truths behind President Obama’s proposed health care plan.

September 24, 2009

In movies and stories, zombies are undead menaces that lurch around mindlessly, in search of flesh — and braaaaaains! Where did the idea for zombies originate? Do they exist outside of fiction? Tune in to this podcast from HowStuffWorks.com to find out.

September 22, 2009

In this special episode of Stuff You Should know, the second of a four-part series, Josh and Chuck — and a special guest — discuss President Obama’s proposed health care plan in detail.

September 17, 2009

A dog that knows exactly when its owners will arrive home every day seems to have a human perception of time, but in fact, they perceive time very differently than we do. Find out more about how dogs view time in this podcast from HowStuffWorks.com.

September 15, 2009

The United States is abuzz with talk of health care reform, but why does the system need repairs in the first place? Josh and Chuck explore how the current American health care system works (and doesn’t) in this episode, the first in a four-part series.

September 10, 2009

Microlending is a practice that provides funds for entrepreneurs in developing countries who couldn’t normally get loans. Tune in as Josh and Chuck discuss the pros and cons of microlending in this podcast from HowStuffWorks.com.

September 8, 2009

Armed with only a GPS and a sense of adventure, geocachers use their wits to locate containers across the world. Join Chuck and Josh as they explore the history, practice and strange origin of geocaching in this podcast from HowStuffWorks.com.

September 3, 2009

Each year, the Ig Nobel Prize is awarded to researchers for unusual — and generally humorous — contributions to science. Tune in as Josh and Chuck discuss the highlights of this unique awards ceremony in this podcast from HowStuffWorks.com.

September 1, 2009

Today, automobiles are undoubtedly the dominant form of transportation in the United States, but that wasn’t always the case. Join Josh and Chuck as they explore the history of public transportation and automobiles in this podcast from HowStuffWorks.com.

August 27, 2009

Jim Henson’s Muppets, including the beloved Kermit the Frog, first came to life in the mid-1950s. Join Josh and Chuck as they explore the history and nitty gritty details of the world’s most famous puppets in this podcast from HowStuffWorks.com.

August 25, 2009

Nuclear weapons are extremely well guarded, so stealing one would be quite tricky. Join Josh and Chuck as they discuss nabbing nuclear weapons, and some surprising facts about nuclear accidents, in this podcast from HowStuffWorks.com.

August 20, 2009

H.P. Lovecraft’s strange, elaborate stories and mythologies have inspired a devoted following. Join Josh and Chuck — and a special guest — as they discuss Lovecraft’s most famous creation, the “Necronomicon,” in this podcast from HowStuffWorks.com.

August 18, 2009

Sarcopenia is a form of muscle loss and coordination associated with aging. Luckily, a little extra effort can prevent its onset. Tune in to learn more about sarcopenia — and how to prevent it — in this podcast from HowStuffWorks.com.

August 13, 2009

Fluoride is a common additive in toothpaste and the water supply of some countries. It’s purportedly good for dental health, but some evidence suggests that it’s actually harmful. Discover the dark side of fluoride in this podcast from HowStuffWorks.com.

August 11, 2009

During World War II, Japanese soldiers adopted a version of the samurai code of honor. Fiercely commited to this ideology, some continued to fight even after the war ended. Learn more about these “stragglers” in this podcast from HowStuffWorks.com.

August 6, 2009

Competitive eating is a modern “sport” that’s very popular in the United States. Join Josh and Chuck as they delve into the fascinatingly gross world of competitive eating in this podcast from HowStuffWorks.com.

August 4, 2009

Agent Orange was a potent herbicide used by the U.S. government during the Vietnam War. Learn more about the origins, use and devastating side effects of Agent Orange in this podcast from HowStuffWorks.com.

July 30, 2009

Whale sharks are the biggest fish in the ocean. Tune in as Josh and Chuck discuss these gentle giants, and recount their experiences swimming with them in the Georgia Aquarium, in this podcast from HowStuffWorks.com.

July 28, 2009

Tinnovators are folks who come up with new and innovative ways to use old Altoids mint tins. Learn about some of these “tinnovators” and their art in this podcast from HowStuffWorks.com.

July 23, 2009

There are some pretty disgusting parasites out there, but Josh and Chuck have settled on three particularly gross ones. Tune in to learn more about flesh-eating parasites, guinea worms and tapeworms in this podcast from HowStuffWorks.com.

July 21, 2009

Is there a negative correlation between happiness and intelligence? Is ignorance truly bliss? Josh and Chuck attempt to answer this age-old question by exploring the “science” of happiness in this podcast from HowStuffWorks.com.

July 16, 2009

Most farms host crops and animals, but body farms specialize in corpses. Join Josh and Chuck as they tackle the fascinatingly gross phenomenon of body farms in this podcast from HowStuffWorks.com.

July 14, 2009

Toxoplasmosis is a parasitic infection that favors cats, but it can also be found in humans. Discover the disturbing details of how toxoplasma gondii finds a host — and how it affects human beings — in this podcast from HowStuffWorks.com.

July 9, 2009

Twinkies have a reputation for being so processed that they can last for years and years, but they’re not as hardy as you’d expect. Uncover the sweet story of Twinkies in this podcast from HowStuffWorks.com.

July 7, 2009

Brainwashing is an extreme form of “thought reform,” but does it actually work? Tune in to this podcast from HowStuffWorks.com to find out.

July 2, 2009

The EPA tests vehicles for maximum fuel efficiency, but those impressive estimates don’t always pan out in real life. Hypermiling is one sure-fire way to improve your fuel efficiency. Find out how it works in this podcast from HowStuffWorks.com.

June 30, 2009

What makes the earth quake? Join Josh and Chuck as they explore the science and history of earthquakes in this podcast from HowStuffWorks.com.

June 25, 2009

People who suffer from body dysmorphic disorder have a distorted, unhealthy view of their bodies. Learn more about this compulsive disorder in the following podcast from HowStuffWorks.com.

June 23, 2009

In a lucid dream, the sleeper is aware that he or she is in a dream state. Does that mean you can control these dreams? Where did this concept come from? Tune in to this podcast from HowStuffWorks.com to find out more about lucid dreaming.

June 18, 2009

The Peter Principle describes how workers who excel in bureaucratic systems are promoted until they reach their level of incompetence. Learn more about the Peter Principle in this podcast from HowStuffWorks.com.

June 16, 2009

The world’s problems necessitate innovative solutions. Listen in as Josh and Chuck propose some innovations, from teleportation to an international language, that the world needs right now in this podcast from HowStuffWorks.com.

June 11, 2009

Carbon capture and storage is a way to filter excess carbon dioxide from the atmosphere and store it. Tune in as Josh and Chuck discuss various methods of carbon capture and storage in this podcast from HowStuffWorks.com.

June 9, 2009

Many people associate Thomas Edison with the invention of electricity, but Nikola Tesla heavily shaped the electrical system we still use today. Get the dirt on the electricity wars between Edison and Tesla in this podcast from HowStuffWorks.com.

June 4, 2009

Hydrocarbons are simple compounds that help fuel the modern world, but they’re not really a sustainable resource. Explore new energy solutions, starting with biohydrocarbons, in this podcast from HowStuffWorks.com.

June 2, 2009

The EPA defines a brownfield as land that is abandoned because redevelopment is complicated by possible environmental contamination. Tune in as Chuck and Josh examine the process of redeveloping a brownfield in this podcast from HowStuffWorks.com.

May 28, 2009

Scientists have proven that spontaneous combustion, or burning without an external ignition source, can occur in some objects. But what about human beings? Tune in and learn more about spontaneous human combustion in this podcast from HowStuffWorks.com.

May 26, 2009

Propaganda, a persuasion tactic typically associated with deception, has been around for centuries. Explore the history of propaganda — and learn how to spot it — in this podcast from HowStuffWorks.com.

May 21, 2009

People have long believed that animals have mysterious powers of prediction. Do animals really have a sixth sense? Explore the fascinating subject of psychic animals in this podcast from HowStuffWorks.com.

May 19, 2009

Lobotomies — brain surgeries to relieve psychiatric problems — are rarely performed today, but they were once fairly common. Tune in to learn more about the controversial history and practice of lobotomies in this podcast from HowStuffWorks.com.

May 14, 2009

These days, shopping for food can pose a dilemma. Should you buy regular, organic or local food? Check out this podcast from HowStuffWorks.com to hear Josh and Chuck discuss whether it’s better to buy local or organic food.

May 12, 2009

If you’ve ever watched a crime drama, you know that bodies get stiff after death. But why? Explore the biochemistry behind rigor mortis in this podcast from HowStuffWorks.com.

May 7, 2009

Lakes are usually tranquil bodies of water, but in rare instances, they can be deadly. Tune in to this podcast from HowStuffWorks.com to hear Josh and Chuck discuss lakes that have exploded — and the factors that create a killer lake.

May 5, 2009

Humans aren’t truly naked apes, but other primates put us to shame when it comes to body hair. Why? Tune in to hear Josh and Chuck discuss the theories and hypotheses behind human hair growth and distribution.

April 30, 2009

In theory, credit default swaps are simply insurance against failed investments. In reality, these swaps can quickly get complicated. Tune in to this podcast from HowStuffWorks.com to hear Josh and Chuck demystify credit default swaps.

April 28, 2009

High fructose corn syrup gets a bad rap, but is it deserved? Tune in as Josh and Chuck discuss the origins of this ubiquitous sweetener — and why it’s not so sweet for your health — in this podcast from HowStuffWorks.com.

April 23, 2009

Believe it or not, scientists and doctors have discovered a way to transplant part — or all — of a face from one person to another. Tune in to this podcast from HowStuffWorks.com to learn more about the astonishing practice of face transplants.

April 21, 2009

How much money does a person or a family need to live? Josh and Chuck are curious to find out, too. Tune in to this podcast from HowStuffWorks.com to discover how needs, wants and peer pressure affect the amount of money we need to live.

April 16, 2009

Toads have a reputation as wart-spreaders, but they’re not actually to blame for the unsightly growths. Viruses are. Tune in to this podcast from HowStuffWorks.com to get the skinny on toads, warts and viruses.

April 14, 2009

Money laundering — the practice of disguising illegal funds — can be domestic or international in nature. Join Josh and Chuck as they take a look at the history, practice and future of money laundering in this podcast from HowStuffWorks.com.

April 9, 2009

There’s been a lot in the news about Ponzi schemes lately. How do they work? And who’s Ponzi? Check out this podcast from HowStuffWorks.com to discover how an Italian immigrant created a classic con that’s still fleecing investors today.

April 7, 2009

You’d think that centenarians — people age 100 and older — would owe their longevity to healthy habits, but that’s not always the case. Tune in to this podcast from HowStuffWorks.com to learn more about genes, longevity and unhealthy habits.

April 2, 2009

When it comes to shucking this mortal coil, no two deaths are exactly alike — and some are truly bizarre. Tune in to this podcast from HowStuffWorks.com to hear Josh and Chuck discuss some of the strangest deaths imaginable.

March 31, 2009

According to the Mayan calendar, a new age will begin on December 21, 2012. Will this mean the end of the world, or just a transition? Tune in as Josh and Chuck discuss whether 2012 will be a bad year for the planet or not.

March 26, 2009

Every year, adventurers brave the elements and attempt to reach the summit of Mount Everest. Yet dangers abound, and more than a hundred bodies litter the mountain. Listen in and learn more about Mount Everest in this podcast from HowStuffWorks.com.

March 24, 2009

Does this episode seem strangely familiar? If so, you might be experiencing deja vu, a topic that scientists are beginning to study seriously. Discover the myriad theories about how deja vu works in this podcast from HowStuffWorks.com.

March 24, 2009

Does this episode seem strangely familiar? If so, you might be experiencing deja vu, a topic that scientists are beginning to study seriously. Discover the myriad theories about how deja vu works in this podcast from HowStuffWorks.com.

March 19, 2009

Anger gets a bad rap, but this unpopular emotion can actually be beneficial to us. Tune in to this podcast from HowStuffWorks.com to get Josh and Chuck’s entertaining take on why we lose our cool.

March 17, 2009

Microexpressions are brief facial cues that reveal a person’s true intentions. Listen in as Chuck and Josh discuss the subtle art of reading faces in this podcast from HowStuffWorks.com.

March 12, 2009

For thousands of years humankind has pursued the enhancement of sexual pleasure and performance through a plethora of medicines and practices — but how many aphrodisiacs actually work? Listen and find out in this podcast from HowStuffWorks.com.

March 10, 2009

International waters cover 71% of the Earth’s surface, and a separate set of laws and regulations govern human activity on the seas. But who actually owns the oceans? Listen and find out in this podcast from HowStuffWorks.com.

March 5, 2009

When a person has alien hand syndrome, his or her hand can move involuntarily, and seemingly of its own volition. Tune in and learn more about this misunderstood syndrome in this podcast from HowStuffWorks.com.

March 3, 2009

When Allan Snyder discovered that transcranial magnetic stimulation produces strange cognitive changes, he believed he’d stumbled upon a “creativity-amplifying machine.” Learn more about the real-life thinking cap in this podcast from HowStuffWorks.com.

February 26, 2009

Almost no one likes junk mail. It’s seen as wasteful, unproductive and — potentially — harmful. Listen in as Josh and Chuck take a closer look at the nature and effects of junk mail in this podcast from HowStuffWorks.com.

February 24, 2009

Can a human being be scared to the point of sudden death? Listen in as Chuck and Josh explore the physiological possibilities behind dying of fright in this podcast from HowStuffWorks.com.

February 19, 2009

Since 1901, about 16 adventurous souls have gone over the falls in search of fame, usually in a barrel or sphere. Tune in as our resident experts take a look at the history of Niagara Falls in this podcast from HowStuffWorks.

February 17, 2009

The practice of squatting is usually defined as camping on unused land or moving into an abandoned structure — and it’s more common than you might think. Tune in and learn more about squatting in this podcast from HowStuffWorks.

February 12, 2009

What is it about Friday the 13th that gives us the collective willies? Discover the surprising roots of this common superstition — and what paraskevidekatriaphobia means — in this HowStuffWorks podcast.

February 10, 2009

When it comes to survival, food and water are pretty much non-negotiable. How long can you go without them? What happens to your body when you cross that threshold? Lend your ear to this HowStuffWorks podcast to find out.

February 5, 2009

If you’ve ever tried to say “toy boat” three times fast, you’ll know that these two words can quickly turn into one tricky tongue twister. But why? Unravel the mysteries of tongue twisters and language in this HowStuffWorks podcast.

February 3, 2009

Three decades after the first reported manned lunar landing, some theorists still believe the landing was faked. Check in as Chuck and Josh take a look at the evidence on both sides of the debate in this podcast from HowStuffWorks.

January 29, 2009

One-third of US cat owners are allergic to cats, resigning themselves to years of suffering and expense on their pet’s behalf . Could hypoallergenic cats be the solution these allergic pet-lovers need? Tune in and learn more in this HowStuffWorks podcast.

January 27, 2009

Several conditions can cause comas, including brain tumors and overdoses. Tune in as the crew discusses the causes and treatments of comas — including some miraculous recoveries — in this HowStuffWorks podcast.

January 22, 2009

Moonshiners brew illegal alcohol, usually a liquor from corn. In the United States, this practice led to some surprising outcomes — including the deveopment of NASCAR. Tune in to learn more about moonshine and racing in this HowStuffWorks podcast.

January 20, 2009

Recycling has come a long way since its debut — and so have landfills. In this twofer HowStuffWorks podcast, discover the realities of modern recycling and find out why the world’s largest landfill might be more aptly described as an “oceanfill.”

January 15, 2009

Redheads are supposedly fiery, passionate people, but is there any truth to these stereotypes? Find out what studies have to say about redheads — and if they’ll really go extinct soon — in this HowStuffWorks podcast.

January 13, 2009

Urban explorers investigate abandoned structures such as hospitals, grocery stores, warehouses and underground systems. Tune into this HowStuffWorks podcast to learn more about the rules, legality and appeal of this fascinating hobby.

January 8, 2009

Body armor has used by bodyguards, celebrities and soldiers for thousands of years. Tune into this HowStuffWorks podcast to learn how the constant innovation in weaponry has led to a similar evolution in defense and armor.

January 6, 2009

Is the idea of possession a misunderstanding of physiological and psychological conditions, or has science failed to account for unknown, legitimate factors? Learn whether exorcism and psychology are mutually exclusive in this podcast from HowStuffWorks.

January 1, 2009

After the election in November, outgoing Presidents have an opportunity to pass last-minute (often unpopular and unpublicized) legislation as ‘midnight regulations.’ Learn more about midnight regulations in this HowStuffWorks podcast.

December 30, 2008

Habeas Corpus is a Latin term meaning “you have the body,” and — in theory — guarantees an incarcerated person the right to have a court determine whether he or she is imprisoned lawfully. Listen to this podcast from HowStuffWorks to learn more.

December 25, 2008

Although you’re much more likely to die in an auto accident, odds are you’re more afraid of flying — but why? Check out this HowStuffWorks podcast to find out.

December 23, 2008

Flirting is an ancient — and, at times, unconscious — form of communication used to indicate interest in and receptivity to another person. Learn about the science of flirting and find out how to flirt in this podcast from HowStuffWorks.

December 18, 2008

From transforming into a gem to being shot into space, modern technology has created a multitude of possible destinations for the bodies of the deceased. Go beyond the traditional funeral in this podcast from HowStuffWorks.

December 16, 2008

Although no one wakes up in the morning hoping for a gunfight, we all know life can be unpredictable. So check out this HowStuffWorks podcast and learn the best place to take a bullet if you get shot.

December 11, 2008

Statistically speaking, extended product warranties aren’t generally worth the money, but there are some purchases that warrant extra insurance. Find out when it’s smart to buy — and when you should say “no thanks” — in this HowStuffWorks podcast.

December 9, 2008

What if Congress passed a law mandating a two-day week work? The Friends of the Five Day Weekend want Congress to do just that — sort of. Check out this podcast to find out if their proposal is feasible or just plain farfetched.

December 4, 2008

You’ve heard of guerrilla fighting tactics, but how much do you know about guerrilla gardening? Check out this HowStuffWorks podcast to learn more about this “revolutionary” gardening trend.

December 2, 2008

Obsessive-compulsive disorder is an anxiety disorder characterized by obsessive thoughts and compulsive actions. Check out this HowStuffWorks podcast to learn more about the effects of and treatments for OCD.

November 27, 2008

Thanksgiving is an unusual holiday in America — there’s no religious connotation, and the only traditions are a good meal and a sense of appreciation for the good things in life. Check out this HowStuffWorks podcast to learn more about Thanksgiving.

November 25, 2008

Albert Einstein is one of the world’s most recognizable geniuses. But was his brain any different from that of an average person? Check out this HowStuffWorks podcast to learn more about Thomas Harvey, the man who set out to decipher Einstein’s brain.

November 20, 2008

Corporate personhood is an ancient legal custom tracing back to Roman law, whereby a corporation is legally considered a person.

November 18, 2008

Eco-anxiety — a chronic fear of environmental doom — is a recent, specialized type of anxiety disorder gripping an estimated 40 million people in the United States. Check out this HowStuffWorks podcast to learn more about eco-anxiety.

November 13, 2008

For thousands of years, societies across the globe have used herbs as medicine. While this practice continues today, the FDA does not regulate these potent substances. Find out why the FDA can’t regulate herbal supplements in this HowStuffWorks podcast.

November 11, 2008

As more and more time passes, the Freedom of Information Act provides increasingly disturbing stories of illegal CIA operations. Check out this HowStuffWorks podcast to learn more about MKULTRA and illegal CIA operations in the United States.

November 6, 2008

The 2008 US financial crisis has been blamed on the excessive use of mortgage-backed securities. But what exactly is a mortgage-backed security? Learn more about these securities and how they contributed to the crisis in this HowStuffWorks podcast.

November 4, 2008

Marriage is an ancient custom, and today’s wedding practices come from age-old traditions. Check out this HowStuffWorks podcast to learn more about the history behind marriage traditions.

October 30, 2008

Studies have shown that prayer has a positive effect on individuals, but can your prayer heal someone else? Check out this HowStuffWorks podcast to find out how science weighs in on the power of intercessory prayer — and if it should at all.

October 28, 2008

Prices in a free market are determined by the law of supply and demand, yet the US government has recently given billions of dollars to rescue large corporations. Check out this HowStuffWorks podcast to learn whether or not the US is still a free market.

October 23, 2008

Due to the region’s elevation, the average traveler to Tibet often experiences altitude sickness — a condition caused by a lack of oxygen in the blood. Check out this HowStuffWorks podcast to learn how Tibetans have adapted to life in high altitudes.

October 21, 2008

The economy imploded as US banks reaped the consequences of subprime mortgage trades. Controversially, Congress has provided emergency funding for the banks. Learn more about the agreement between Washington and Wall Street in this HowStuffWorks podcast.

October 16, 2008

If you’re tired of paying utility bills or relying on fossil fuels, it might be time to consider living off the grid. Check out this HowStuffWorks podcast to learn more about the techniques and strategies used by people living off the grid.

October 14, 2008

Is Earth due for a mass extinction? Population ecologists think so. Check out this HowStuffWorks podcast to learn more mass extinctions.

October 9, 2008

Cannibalism is one of humanity’s near-universal taboos, but it has been practiced in widely varying circumstances throughout history. Check out this HowStuffWorks podcast to learn the difference between the three types of cannibalism.

October 7, 2008

Entomophagy — the practice of eating insects — is common outside of Europe and North America. Despite cultural taboos, you’ve probably eaten insects without knowing it. Check out our HowStuffWorks podcast to learn more about entomophagy.

October 2, 2008

In China’s Guangdong province, twelve volunteers have been trained to detect harmful pollution by using their sense of smell. Check out this HowStuffWorks podcast to learn more about China’s pollution sniffers.

September 30, 2008

With the world’s best weaponry, a shadowy legal status, and almost no oversight, Delta Force is the stuff of military legend. Check out this HowStuffWorks podcast to learn why Delta Force was created, and how this group works.

September 25, 2008

Graceland attracts millions of visitors every year. Check out this HowStuffWorks podcast to learn more about Elvis and Graceland, which Elvis bought when he was only 22 years old.

September 23, 2008

Everyone knows it’s tough to quit smoking — but did you know quitting can be contagious? Check out this HowStuffWorks podcast to learn more about smoking.

September 18, 2008

Everyone dreams of snagging a fresh start at life. Whether you’ve thought of changing your dull given name, or just disappearing entirely, this HowStuffWorks podcast will tell you what it takes to erase your identity.

September 16, 2008

The ultimatum game is an economics experiment that provides insight into the human psyche. Check out our HowStuffWorks podcast to learn about the rules to the ultimatum game.

September 11, 2008

Humanity has adapted to life on the surface. We like sunlight and fresh air — but do we need it to survive? Check out this HowStuffWorks podcast to learn more about living underground.

September 9, 2008

Sleep is one of those funny things about being a human being — you just have to do it. Have you ever wondered why? Check out our HowStuffWorks article to learn more about the importance of sleep.

September 2, 2008

But there’s no consensus among professionals about which method of death is the least desirable. A person’s fears may factor into his own personal worst way to die. Check out our HowStuffWorks article to learn more about the worst way to die.

August 28, 2008

With the benefit of wireless technologies like cell phones and text messaging, large groups of people are able to coordinate their actions with amazing precision. Check out this HowStuffWorks podcast about smart mobs and civil disobedience.

August 26, 2008

Some researchers believe that weddings between a human and a robot could be possible by the year 2050. Take a look at our HowStuffWorks article to learn more about robot rights.

August 21, 2008

High blood pressure — or hypertension — is elevated pressure of the blood in the arteries. Hypertension results from two major factors. Check out our HowStuffWorks article to learn more about the causes of and treatment for hypertension.

August 19, 2008

Are humans born with survival instincts? Check out our HowStuffWorks article to learn more about human instincts and survival.

August 14, 2008

Ten terribly bungled crimes throughout history are explored, such as drug deals gone wrong. Find out which ones are at the top of the list for Josh and Chuck in this HowStuffWorks podcast.

August 12, 2008

Millions of people across the world enjoy scuba diving — and, unbelievably enough, a few pets have also taken up this hobby. Check out our HowStuffWorks article to learn more about how a cat’s devotion to her best friend got her underwater.

August 8, 2008

In May of 2007, the US military found drawings believed to be part of an Al-Qaida torture manual. However, the seminal manuals on torture are believed to be the work of the CIA. Check out our HowStuffWorks article to learn more about torture manuals.

August 5, 2008

The 1996 Chuck Palahniuk novel, “Fight Club,” has been blamed — and lauded — by various groups for inspiring several real-life fight clubs. Take a look at our HowStuffWorks article to learn more about real-life fight clubs.

July 31, 2008

In 1995, World Bank vice president Ismail Serageldin declared that “the wars of the next century will be about water.” Check out our HowStuffWorks article to learn what happens once we run out of water.

July 29, 2008

Fair chase is the idea that a balance should be struck between the hunter’s ability to kill prey and the prey’s ability escape. Take a look at our HowStuffWorks article to learn more about knife hunting, and whether or not it’s the fairest way to hunt.

July 24, 2008

Blushing from embarrassment is governed by the sympathetic nervous system, which governs involuntary processes. Although we know how people blush, we still don’t understand why. Check out the theories of blushing in our HowStuffWorks article.

July 22, 2008

Carbon capture is the process of trapping carbon emissions and storing them away from the atmosphere to prevent global warming. Check out our carbon capture article at HowStuffWorks.com to learn more about the possibility of reducing carbon emissions.

July 17, 2008

In 2005, The Sun reported that dogs were being used as live bait in the Indian Ocean. Is it possible that dogs are a delicacy to sharks? Take a look at our HowStuffWorks article to learn more about the diet of sharks.

July 15, 2008

Although it can be intimidating, a shark is not invulnerable. Punching its nose, gouging its eyes, or grabbing its gills can stun the shark and give victims a chance to escape. Check out our HowStuffWorks article to learn more about shark attacks.

July 10, 2008

The unsolved murder spree of Jack the Ripper has captivated generations of amateur investigators, each with their own theory of the killer’s identity. Learn more about one particularly thought-provoking suspect in this HowStuffWorks podcast.

July 7, 2008

Personal rapid transport combines the best traits of subways and taxis, and costs less to build than light rail. Could this be the future of transportation? Check out this HowStuffWorks podcast and learn more about personal rapid transport.

July 1, 2008

Cities can become abandoned for a number of reasons, from economic meltdowns to nuclear catastrophes. Check out this HowStuffWorks podcast and learn more about modern abandoned cities.

July 1, 2008

Murphy’s law originates in 1949, and states ‘anything that can go wrong, will.’ Check out this HowStuffWorks to learn more about how the Air Force discovered Murphy’s law.

June 26, 2008

Could high-end digital auto systems such as blind-spot detection and collision prevention overcome the errors of human drivers? Check out this HowStuffWorks podcast to learn more about the death-proof cars of the future.

June 24, 2008

Oil shale is a term for oil trapped in rock, rather than existing in liquid form. Check out this HowStuffWorks podcast to learn more about the nature of oil shale.

June 20, 2008

Swear words are usually considered workplace taboos — yet the debate continues over whether these words are inappropriate, or examples of free speech. Learn more about using swear words at work in this HowStuffWorks podcast.

June 18, 2008

The United Nations has found that 22% of the world’s population does not have access to clean drinking water. Could we fix the water shortage by manufacturing water? Check out this HowStuffWorks podcast to learn more about manufacturing water.

June 12, 2008

The most expensive toilet in the world is made of solid gold and can be found in Hong Kong. Learn more about the world’s most expensive toilet in this HowStuffWorks podcast.

June 10, 2008

Salt water fuel could be the next viable alternative to foreign oil. Learn about the ongoing research behind the concept of salt water fuel in this HowStuffWorks podcast.

June 5, 2008

In recorded history, only two people have entered the eye of a tornado and returned to tell the tale. Learn more about the inside of tornadoes in this HowStuffWorks podcast.

June 3, 2008

Yawning is contagious, but why? Check out the leading theories on contagious yawning and empathy in this HowStuffWorks podcast.

May 29, 2008

During times of emergency, people have been known to preform feats of great strength. Learn more about going from the dull stare of the dairy cow to the eye of the tiger in seconds flat.

May 28, 2008

Could the routine use of antibacterial soap increase the presence of drug-resistant bacteria in your home? Learn more about the disadvantages of anti-bacterial soap in this HowStuffWorks podcast.

May 20, 2008

Check out the story of Hachiko, a loyal Akita who waited for over ten years for his master to return. Learn more about Hachiko and loyalty in this HowStuffWorks podcast.

May 15, 2008

How does isolation spur evolution? Check out this HowStuffWorks podcast to learn more about speciation and evolution.

May 6, 2008

The trolley problem is an ethical dilemma that proposes a difficult decision about choosing whether a group of strangers lives or dies. Learn more about ethics and the nature of sacrifice in this HowStuffWorks podcast.

May 6, 2008

Sympathy pregnancy is the condition where a man feels pregnant while his wife actually is. Learn more about the symptoms for sympathy pregnancy in this HowStuffWorks podcast.

April 30, 2008

After the close of World War II, Nazi war criminals fled Europe and attempted to hide under assumed identities. Some may still be at large. Learn more about Nazi war criminals in this HowStuffWorks podcast.

April 17, 2008

Is there such a thing as a truly unselfish act? Check out this HowStuffWorks podcast and learn more about the nature of altruism.

April 17, 2008

In U.S. politics, a lame duck is a president who will not be re-elected because he or she has been passed over for election, or already served the maximum two terms. Learn more about the origin of lame duck presidents in this HowStuffWorks podcast.

April 17, 2008

Could switch grass become the car fuel of the future? Learn more about alternative fuel in this HowStuffWorks podcast.