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Natural Sleep and Its Seasonal Variations in Three Pre-Industrial Societies
by
jeeshan
on 10/18/15, 7:15 PM with 1 comments
by
dang
on 10/18/15, 7:19 PM
Lots of submissions about this recently, including
https://news.ycombinator.com/item?id=10397408
and
https://news.ycombinator.com/item?id=10401640
.