For millennia humans have recognized four tastes, but in the 1980s a fifth taste first isolated in Japan gained worldwide acceptance - and took off like a rocket! Learn about meaty, musty, savory umami in this classic episode.

The Hindenburg Disaster
50:02

Short Stuff: Did Tippi Hedron start the Vietnamese manicure industry?
12:58

Humanists, the Happy Heathens
50:01