Stuff You Should Know

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

It wasn't until the 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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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 make even more money. Learn all about this bizarre, uniquely American holiday custom in this episode. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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

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

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

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

Everybody knows that cosmologist Stephen Hawking has an enormous brain, but did you also know he has an equal wit? Learn about some of the lesser-known details about the celebrated physicist in this episode. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

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

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

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

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

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

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

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

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