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.

Selects: How Narcolepsy Works
52:41

Rope, yeah ROPE!
43:31

Short Stuff: Did a shipwreck double the size of the United States?
11:46