Mysteries of Sleep

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Mysteries of Sleep

Season 47 Episode 4 | 53m 26s | CC

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.

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Additional funding is provided by the NOVA Science Trust with support from Margaret and Will Hearst. National corporate funding for NOVA is provided by Draper. Major funding for NOVA is provided by the David H. Koch Fund for Science, the Corporation for Public Broadcasting and PBS viewers.

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