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Explore the mystery of sleep

Why do we sleep? And what does sleep have to do with memory, trauma, and our emotions?

  • Fred Vigeant
Watch The Mysteries of Sleep on NOVA  Wednesday, December 2 at 9:30pm on WITF. You can stream WITF TV live on our website and through the PBS Video app on Roku, Apple TV and iPhone and Android smartphones. The program is also available on-demand through the PBS Video app.


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.

Watch NOVA Wednesday December 2 at 9:30pm on WITF. Watch episodes of NOVA on-demand through the PBS Video app and through our website.  Older episodes are only available to WITF Passport members. Learn more…

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