Natural Sleep and Its Seasonal Variations in Three Pre-Industrial Societiescell.com 2 pointsjeeshan10 years ago1 commentSaveHideCopy link On HNComments−dang10yLots of submissions about this recently, including https://news.ycombinator.com/item?id=10397408 and https://news.ycombinator.com/item?id=10401640.
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Lots of submissions about this recently, including https://news.ycombinator.com/item?id=10397408 and https://news.ycombinator.com/item?id=10401640.