Stuff You Should Know

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. Bonus: Chuck discusses his caving experience.

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. Bonus: Chuck discusses his caving experience.

Ah, autumn – arguably the most beautiful time of the year, thanks to the vibrant colors trees put on display as they close up for the winter. Ever wonder why and how trees change color in the fall? Chuck and Josh have it down pat and explain it here.

Ah, autumn - arguably the most beautiful time of the year, thanks to the vibrant colors trees put on display as they close up for the winter. Ever wonder why and how trees change color in the fall? Chuck and Josh have it down pat and explain it here.

Sure the fatcats get all the credit for donating millions, but did you know US households making $20,000 or less contribute the highest percentage of their income to charity? Learn more (not to mention a sexy look at the U.S. tax code) in this episode.

Sure the fatcats get all the credit for donating millions, but did you know US households making $20,000 or less contribute the highest percentage of their income to charity? Learn more (not to mention a sexy look at the U.S. tax code) in this episode.

In 2009, a fertility clinic controversially offered parents the ability to customize their children. How will society take the idea of designing children? Do we have a moral obligation to design better people? Join Josh and Chuck for this heavy episode.

In 2009, a fertility clinic controversially offered parents the ability to customize their children. How will society take the idea of designing children? Do we have a moral obligation to design better people? Join Josh and Chuck for this heavy episode.

You know how when you do a lot of crystal methamphetamine you get meth mouth, where your teeth decay? Of course you don’t! So check out this in-depth look on the most widely-abused hard drug in the world. Even tweakers will learn something new.

You know how when you do a lot of crystal methamphetamine you get meth mouth, where your teeth decay? Of course you don't! So check out this in-depth look on the most widely-abused hard drug in the world. Even tweakers will learn something new.