Stuff You Should Know

Creating fire was possibly the most important human discovery, but it's easy to take for granted. But. Josh and Chuck get to the bottom of the chemistry of fire in their quest to explain everything in the universe, in this classic episode. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

No food is more all-American than peanut butter – 80 percent of homes in the country have a jar of it in the pantry right now. And while the rest of the world might find peanut butter peculiar, maybe even gross, the rest of the world is wrong. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

You know those terrible leg cramps that come out of nowhere? They may be named after a drunken baseball pitcher. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Herd immunity is an epidemiological concept that if enough people are inoculated against a disease the rest of us won’t get it. It’s been useful in holding back diseases like polio and measles, but we have vaccines for them. We don’t have one for Covid-19. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Entrances to the underworld have been places of wonder for eons, and humans have ventured into caves to sleep, hunt, create art and explore. Thanks to the hobby of caving, that tradition continues today. Get all this plus Chuck discussing his caving experience, in this classic episode. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

The zipper may be the most unsung invention we humans have ever come up with. Prior to zippers, everyone walked around like idiots with nothing but buttons to hold their clothes together. The zipper changed all that. The zipper changed everything. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

There was a glorious time in American history when circus sideshow performers lived together in a small town in Florida. Learn about the fascinating history of Gibtown today! Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Spartacus was a real dude. He led a slave revolt, and was pretty successful to boot. I'm Spartacus. You're Spartacus. We are all Spartacus. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

A dog that knows exactly when its owners will arrive home every day seems to have a human perception of time, but in fact, they perceive time very differently than we do. Find out more about how dogs view time in this classic episode. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Agatha Christie was a great writer of murder mystery novels and is probably the best selling author of all time. Listen in today to learn her story. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Business in the front, you know the rest. Listen in as we discuss the lifestyle choice that is the mullet. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

An existential risk is a special kind of threat that are different from other types of risks in that if one of them ever befalls us, it would spell the permanent end of humanity. It just so happens we seem to be headed for just such a kind of catastrophe. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Back when this episode aired, the USPS was teetering on the edge of going under and there were a lot of plans on the table to save it. With the USPS again at risk now for different reasons, join Chuck and Josh as they explore the history and future of the postal service in this classic episode. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

As part of a super 70s push to get Earth to a seat at the table of the Galactic Federation (in case there is, in fact, such a thing), astronomer Carl Sagan oversaw an ambitious project to launch a compilation of Earth’s greatest hits into deep space. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Today Chuck and Josh take a shallow dive in the warm pool that is the NY Times Crossword Puzzle. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Today, Chuck and Josh dive into the funky, cool world of the classic TV show, Sooooooooul Train. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

Yes, it's true: Unions have a shady mob-related past and were originally championed by anarchists. Born from medieval trade guilds, these organizations also helped grow the American economy, and not only protected but established workers' rights. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

All that gross stuff we humans put in the water that gets flushed down the sewers has to be taken back out before that water is reintroduced to the environment. That’s the ideal, and it’s essential to staving off the imbalance people bring to the planet. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

It’s a typical human reaction: When you’re driving and you realize that you’re lost, you turn down the radio. On its face it makes no sense – or does it? (It does.) Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.

We all know the benefits of bidets. But with toilet paper in short supply, they're more important than ever before. Learn more about your ad-choices at https://www.iheartpodcastnetwork.comSee omnystudio.com/listener for privacy information.