Stuff You Should Know

You know when you drop a piece of food and if you pick it up within five seconds it's still good to eat? Researchers have studied whether that's true or not and in doing so have inadvertently shone a light on how utterly covered our world is with bacteria and germs. Prepare to shudder in this episode of Stuff You Should Know. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com...

Chuck and Josh take on astrophysics again and this time it pans out well. It turns out that there simply isn’t enough matter in the universe to account for its mass. Which is super weird. What is this missing matter? Does it even exist? Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

Being colorblind doesn't mean you see in black and white, although in severe cases it can look a bit like that. The condition is on a spectrum ranging from dulled colors to shades of grey. Learn all about what colorblindness means in today's episode.  Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

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 this classic episode to find out. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

In the US, winner-take-all voting has created A LOT of political polarization. But what if rather than voting for one candidate, you could rank all of them so if your first choice doesn’t win, your vote goes to your second choice? So long, polarization! Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

They’re as American as Washington, DC yet most people in the US are terrified of them, hate them or both. What is it about traffic circles and roundabouts - which do nothing but safely, inexpensively and greenly direct traffic – that America can’t stand? Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

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. In this classic episode, learn about the history of these insidious and catchy advertising vehicles with Chuck and Josh. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy informati...

Think tanks? More like stink tanks! We're kidding. Think tanks do valuable work, when they operate in a non-partisan way of course. Learn all about the history of these heady institutions today.  Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

Join Josh and Chuck and a whole bunch of great people at the Gothic Theatre in Denver for this live show on game shows and their place in cultures around the world, recorded on June 28, 2018. You just come right on down, why don’t you? Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See 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. In this classic episode, 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.com See omnystudio.com/listener for privacy information.

What started out as an egg timer at a London pub became a furnishing for bachelor pads before it took its rightful place as the most recognizable icon of psychedelia. The lava lamp became popular with people on LSD not once, but twice, decades apart. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

Police lineups are something most people have never had any firsthand experience with. What you see on TV and in movies isn't so far off though. Learn about how these tropes work for real in today's episode.  Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

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

Elimination diets are all about whittling down what you eat, then building it back up again in order to identify foods that don't work for your body. Is it safe? It can be. Learn all about this process in today's episode.  Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

1946 was a particularly deadly year for hotel fires in the US. Fires killed hundreds of people in Chicago, Dubuque, Dallas and, in Atlanta, the worst hotel fire in American history broke out. Find out how they made staying in hotels safe. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

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

Almost everything you know about pterosaurs is wrong. They weren't birds, they weren't flying dinosaurs and they weren't all pterodactyls. Which makes this a great episode for you to learn some new and amazing stuff about terrifying prehistoric beasts! Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

Get ready, folks. The ballpoint pen is far more interesting than you could ever imagine. For real. Brilliant in its simplicity. Took the world by storm. We love our ballpoint pens and you should too. Listen in today! Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

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

In 2018, there's a man from a lost tribe still living deep in the jungles of Brazil who has been all alone since the mid 1990s. He's referred to as the Man of the Hole, and has had no face-to-face with modern humans. Who is he? We'll answer that question as best we can in today's episode.  Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for priv...

If you’ve ever seen someone break a stack of boards or concrete blocks with a single karate chop you know what it means to experience awe. Board breaking is indeed cool but there’s also a lot of physics to help it along. Learn all about this secret art.  Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

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

If you go to the Internet you'll see a few people championed as all-time greatest conquerors - Alexander the Great, Genghis Khan and Atilla the Hun. Listen in today as Josh and Chuck dive into number three on this list, Atilla the Hun.  Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

There are thankfully about as many ways to look for someone as there are ways to get lost. And the people who dedicate themselves to saving the lives of people who are missing take their job seriously. Learn about this fascinating world in this episode. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

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. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com S...