Scientists believe that 99% of the estimated 50 billion species that have ever lived on Earth have disappeared through extinction. This is a natural process typically, but it can also be cataclysmic and it's becoming clear we are amid a massive one. Find out more with Josh and Chuck in this classic episode.

Selects: BPD: The Worst Disorder or Not a Disorder at All?
50:55

Data Centers: Can't Live With Em, Can't Live Without Em
48:14

Short Stuff: Did a vampire legend help win the Cold War?
12:55