Down From the Trees, Humans Finally Got a Decent Night’s Sleep - NYTimes.com

http://mobile.nytimes.com/2015/12/22/science/down-from-the-trees-humans-finally-got-a-decent-nights-sleep.html?referer=http:/m.facebook.com&referer=https://news.ycombinator.com/&smtyp=cur&smid=fb-nytimes&_r=0

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First saved: 2015-Dec-18 (Fri)
Last checked: 2015-Dec-18 (Fri), response 303