Sleeps helps brain stay fit by clearing waste

English: Tim Phillips speaks at an AFP healthc...

English: Tim Phillips speaks at an AFP healthcare rally next to the United States Capitol in October 2009. (Photo credit: Wikipedia)

Sleep helps brain stay fit by clearing waste (via AFP)

Like a janitor sweeping the halls after the lights go out, major changes occur in the brain during sleep to flush out waste and ward off disease, researchers said Thursday. The research in the journal Science offers new answers to explain why people…

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