7.6

NOVA•Season 47•Episode 4

Mysteries of Sleep

7.6/10 · 91 votesFeb 26, 202055 min

Ranked #12 of 16 in Season 47•−0.3 vs season avg

Discussion

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

Previous episodeE3 · Cat Tales Next episodeE5 · Cuba's Cancer Hope

Seasons53

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Season 47 Episodes16

Polar Extremes

Dog Tales

Cat Tales

Mysteries of Sleep

Cuba's Cancer Hope

The Truth About Fat

Decoding COVID-19

Eagle Power

Human Nature / Gene-Editing Reality Check

E10 8.1

Secret Mind of Slime

E11 8.1

A to Z: The First Alphabet

E12 8.3

A to Z: How Writing Changed the World

E13 7.6

Nature's Fear Factor

E14 7.9

Touching the Asteroid

E15 7.5

Can We Cool the Planet?

E16 7.6

Saving Notre Dame

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Episode Summary

"Mysteries of Sleep" is episode 4 of NOVA season 47. It scored 7.6/10 from 91 votes, ranking #12 of 16 episodes this season (season average 7.9). It aired on February 26, 2020.

Next: E5 · Cuba's Cancer Hope Best of Season 47