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BAMAPHIN 22
03-17-2008, 02:45 PM
Human beings spend on average one third of their lives asleep. We know we need to sleep but most of us have never really given a whole lot of thought to why.


Why do we spend seven or eight hours a night immobile and unconscious? What really happens inside our brains and bodies while we're sleeping?


We've known the purpose of our other biological drives for hundreds of years: we eat to give our bodies energy, we drink to keep hydrated, we procreate to perpetuate the species - among other things. But what is the biological purpose of sleep?

http://www.cbsnews.com/stories/2008/03/14/60minutes/main3939721.shtml