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.

Some Silly Inventions That Became Wildly Popular
42:54

Selects: Sammy Davis Jr: National Treasure
56:24

The Sewol Ferry Disaster
45:30