Why Do We Sleep? - Instant Egghead #55

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We spend nearly a third of our lives asleep, but scientists don't agree on sleep's purpose. Scientific American contributor Joss Fong explains what we know, and don't know, about our nightly slumber.

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More to explore:

A Night's Sleep Cleans Brain of Harmful Toxins (LiveScience)

Sleep Is The Brain's Way of Staying in Balance [Video] (Scientific American)

Is Sleep Essential? (PLoS Biology)

Sleep 2009 Interview with Jerome Siegel (The Science Network)

Why Does My Brain Sleep? - Matthew P. Walker (GoogleTechTalks)

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Credits:
Written & presented by Joss Fong
Edited by Joss Fong
Produced by Eric R. Olson
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I like these videos they seem interesting to me.

zhamyrahtrovato
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Maybe sleep is like the tail. Pretty much present in all vertebrates, but expressed and used differently in all. Like an odd appendage that developed uses after the fact, or became useless and exists as a vestige. There may not be a universal purpose.

gutspraygore
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Asking why we are awake is the most stupid question in history? To work, eat, drink, socialize with friends and family, thats well spend energy

MrRamazanLale
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dont lions sleep so much because they dont eat 3 square meals a day.. binge and fast(sleep)

rsmith