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A. Roger Ekirch "Sleep We Have Lost: Pre-industrial Slumber in the British Isle" http://www.historycooperative.org/journals/ahr/106.2/ah00034...

This is the seminal article on segmented sleep. Pretty fascinating stuff.

And a shorter TED video: http://www.ted.com/talks/jessa_gamble_how_to_sleep.html




That Ekirch article is great reading. Thank you.




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