Stuff You Should Know

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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.