Stuff You Should Know

It's tough to predict the future. Instead, the future looks a lot like it does now: Faster data transfer rates, more social networking, ubiquitous mobile devices -- and possibly dumber people from using all this stuff. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

In 1820, most of the drugs listed in the American Pharmacopoeia were plant-based; by 1960, it was a mere 5 percent. Yet in the late 20th century this trend reversed. Why? Join Josh and Chuck as they get to the root of ethnobotany and plant-based medicine. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

A condition known as chromhidrosis can be jarring: The sufferer excretes colored sweat from the eccrine or the apocrine sweat glands. Join Josh and Chuck as they explore this somewhat understood, but still bafflingly mysterious medical condition. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

SPAM is a canned meat product made from pork shoulder and ham. First introduced in 1937, this iconic food has spread to stores across the world. But what exactly is it, how did it get here -- and why is its shelf life "indefinite?" Tune in to find out. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

Wildfires consume an annual average of 5 million acres in the US. But what causes wildfires? How do they become so powerful? More importantly, how do we fight them? Join Josh and Chuck as they take you to the frontlines of the fight against wildfires. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

While it's kind of perverted in the West, the concept of karma is a central tenet of several Eastern religions. Karma isn't just good or bad -- it's a natural law. Join Josh and Chuck to learn more about karma in this religiously respectful episode. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

You smile because you're happy, yet happiness research suggests the opposite can also hold true. Smiling may actually improve your mood. Open interpretation make for the best SYSKs, so prepare for an old-fashioned academia studyfest with Chuck and Josh. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

What makes America unique? In the second segment of this special two-part episode, Josh and Chuck join up with guests from The Daily Show and The Onion to take a closer look at the Stuff You Should Know About America. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

What makes America unique? In the first segment of this special two-part episode, Josh and Chuck join up with guests from The Daily Show and The Onion to take a closer look at the Stuff You Should Know About America. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

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 more about the bizarre performances of human cannonballs. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

Hate is generally defined as an extreme hostility to something or someone, usually stemming from fear, anger or a sense of injury. But how does it work? Join Josh and Chuck as they dig into the nature of hate. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

John Billington didn't just sign the Mayflower Compact -- he was also the colony's first criminal, and had the dubious honor of being the first European to be convicted of murder in this new place. But how did it happen? Tune in to find out. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

There may be trillions of dollars' worth of resources in asteroids, and some scientists believe we could mine nearby asteroids. Join Josh and Chuck as they explore how asteroid mining might work (and why we haven't done it yet). Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

It 1981 the first modern suicide bomber blew himself up. But this was by no means the first suicide bombing. Israeli psychologists evaluated the motivations of suicide bombers and found a number of commonalities. Join Josh and Chuck to learn more. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

Alternately hailed a crucial part of the human condition or accused of killing cats, curiosity remains a subject of debate among researchers. Where does it come from? How does it work? Join Chuck and Josh as they explore the mysterious roots of curiosity. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

Military snipers always work in pairs, and they're called force multipliers because of the profound effect a two-man team can have on a rival military. But how do they work? Join Josh and Chuck to learn more about snipers. 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 find out. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

As early as 1786, groups assembled to help slaves escape lives of bondage. And, as the 19th century progressed, the emergent Underground Railroad grew more sophisticated in aiding escaped slaves. But how did it work? Join Josh and Chuck to learn more. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

Fear results from your brain's reaction to a stressful stimulus, and -- though it may be unpleasant -- it plays a crucial role in the life of every human being. But how does it work (and why)? Join Josh and Chuck as they explore the sensation of fear. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.

Sure, nicotine doesn't cause cancer, but it does rearrange the brain's reward system. Humans have been ingesting this plant for more than 6,000 years, but we generally understood little of it. Join Chuck and Josh as they explain how nicotine works. Learn more about your ad-choices at https://www.iheartpodcastnetwork.com See omnystudio.com/listener for privacy information.