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Scientific American: Why do we sleep?

It is reasonable to assume the human race is doomed at this uncomfortable juncture in the conversation, and aliens will plan their stealthy attack during this incapacitated, seemingly futile stage of our existence. But sleep isn’t futile. In fact, theories on sleep assert its role in reenergizing the body’s cells, clearing waste from the brain, and supporting learning and memory. (January 25, 2019)

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from Brain Health Daily http://bit.ly/2DEi268

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