Like virtually every other animal, humans need sleep to survive. But why? Scientists peer into the brain to see what happens while we snooze and understand the powerful role that sleep - or lack of it - plays in memory, trauma and emotion regulation.
Duration: 56 minutes and 46 seconds
Episode Number: 4704
No future air times were found for this episode.
PBS' premier science series helps viewers of all ages explore the science behind the headlines.
Along the way, NOVA programs demystify science and technology and highlight the people involved in scientific pursuits.
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