Why Do We Have To Sleep? 

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…and how did it evolve in the first place?
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Why do we sleep? We spend a third of our lives in slumber, but science has yet to determine exactly why we have do it. Here’s a look at how sleep works, why we’re not getting enough sleep, what happens if you DON’T sleep, and an idea about where sleep came from in the first place.
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Also check out BrainCraft:
• How to Beat Jet Lag
• Amazing Effects of Sle...
For more, read:
“Dreamland: Adventures in the Strange Science of Sleep” by David K. Randall amzn.to/1MB38dt
"The Universal Pastime: Sleep and Rest Explained" by Dr Richard Horner amzn.com/B00NT9...
Cool research on melatonin in sea worm larvae: www.nytimes.com...
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It’s Okay To Be Smart is written and hosted by Joe Hanson, Ph.D.
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Joe Hanson - Creator/Host/Writer
Joe Nicolosi - Director
Amanda Fox - Producer, Spotzen Inc.
Kate Eads - Producer
Andrew Matthews - Editing/Motion Graphics/Animation
Arts & Labor - Motion Graphics
Katie Graham - Camera
John Knudsen - Gaffer
Theme music: “Ouroboros” by Kevin MacLeod
Other music via APM
Stock images from Shutterstock, stock footage from Videoblocks (unless otherwise noted)