Why do leaves change colors in the fall?

When Ronald Reagan was president, America got involved in some deeply shady stuff, not the least of which was the Iran-Contra scandal – a convoluted operation that managed to combine an illegal covert...

6 Aug 201946min

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 po...

3 Aug 201932min

A pair of old timey fossil hunters had a rootin’ tootin’ rivalry that spilled from academic journals into the American Wild West - where fossils were dynamited and employees turned double agent. Learn...

1 Aug 201953min

In 1965, a 456-pound man walked into a hospital in Scotland and asked for help with a fast. That was the last day he ate for more than a year. Learn about the medical marvel that was Angus Barbieri. ...

31 Juli 201912min

Very recently, thanks to a new type of AI, it’s gotten much easier to create convincingly realistic videos of people saying and doing things they’ve never said or done. Will fake videos undermine our ...

30 Juli 201943min

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 mor...

27 Juli 201929min

Few things are more compelling than a witness pointing out a defendant in the courtroom as the perpetrator. But few things are also more unreliable than eyewitness testimony. Our memories can be prett...

25 Juli 201955min

This week we highlight another little known historical hero. In this case, a Portuguese diplomat who rescued people from Nazi Germany, at his own peril. Dig in and spread the word of Aristides de Sous...

24 Juli 201912min