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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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). Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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." Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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). Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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! Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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Cleaning up crime scenes is a niche industry that's both lucrative and messy. This episode, Josh and Chuck take a look at how crime-scene clean-up works. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Cremation is a burial process practiced around the world, but how exactly does it work? Josh and Chuckers take a detailed look at cremation's history, practices and controversies in this episode. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.