Arizona PBS Previews

NOVA : 4704

Preview | 30s

"Mysteries of Sleep" - From fruit flies to whales, virtually every animal sleeps. But why? 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: 02/26/20

Rating: NR

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