Human bodies buried in bogs can retain some features -- like perfectly preserved skin, right down to forehead wrinkles -- for thousands of years. Learn how this natural mummification process works in today's classic episode of BrainStuff.

How Did Beer Help Sell the Myth of Custer's Last Stand?
10:08

How Does Bioluminescence Work?
12:15

How Is Maillardet's Automaton Still Wowing Us After 200 Years?
09:28