What matters to you.
0:00
0:00
NEXT UP:

Mysteries of Sleep

Season 47 Episode 4
Mysteries of Sleep

About the Episode

From fruit flies to whales, virtually every animal sleeps. But why? Why do we need to spend nearly a third of our lives in such a defenseless state? Scientists are peering more deeply into the sleeping brain than ever before, discovering just how powerful sleep can be, playing a role in everything from memory retention and emotional regulation to removing waste from our brains.

Aired: 02/25/20 | Expires: 03/30/22 | Runtime: 53m 26s
Support for GBH is provided by: