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Our Ancestors Didn't Sleep Like Us - This Is Why You Wake Up In The Middle Of The Night -
Many people find themselves awake in the middle of the night for no apparent reason. This often causes them to worry about how tired they will be in the morning. However, worrying is worse than the actual waking. Waking up at about 2 to 3 in the morning is an old evolutionary trait that still …
sleep  science 
january 2016 by traggett
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