The myth of the eight-hour sleep

February 22, 2012

[There's] a wealth of historical evidence that humans used to sleep in two distinct chunks [--] a first sleep which began about two hours after dusk, followed by a waking period of one or two hours and then a second sleep.

Fascinating. (How is it possible that during all of my research into human evolution--I've read a kajillion books on the subject--I've never seen this discussed?)

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