sleep
 






 

Question by  wrestler88 (192)

Why do we have to sleep?

I realize it's to rejuvenate, but why do we need it? And why so much? Something like 1/3 of our life is spent sleeping.

 
+7

Answer by  Zoso (869)

Nobody knows the answer to that one yet, although plenty of people have noticed this waste of human time and sought a 'cure'. Sleep researchers, including the pioneering Dr. William Dement, have found that prolonged sleep deprivation causes an array of bad things: loss of brain function like being drunk, physiological damage leading to diabetes, death in lab animals, etc.

 
+6

Answer by  beenthere13 (197)

Sleeping is the body's natural way to rest and rejuvenate after being on the go most of the day. The body has to re-energize in order to function properly and sleeping is the only way to accomplish this task.

 
+6

Answer by  shalom (271)

Scientifically, we still don't know why we have to sleep or why we need so much sleep (i. e. , about 8 hours).

 
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