09/12/2014 10:34 am ET

The True Powers Of Sleep


When our heads hit the pillow every night, we tend to think we're surrendering. Not just to exhaustion, though there is that. We're also surrendering our mind, taking leave of our focus on sensory cues, like noise and smell and blinking lights. It's as if we're powering ourselves down like we do the electronics at our bedside -- going idle for a while, only to spring back into action when the alarm blasts hours later.

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