Why Do We Need To Sleep?

We humans spend roughly one-third of our lives asleep but researchers don't know why.  Science magazine listed the function of sleep is one of the 125 greatest unsolved mysteries in science and we've seen theories range from brain 'maintenance', including memory consolidation and pruning, to reversing damage from oxidative stress suffered while awake, to promoting longevity. None of these theories are well established, and many are mutually exclusive.  read more

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