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November 18, 2009



Your internal clock just wants to go back to its "normal" pattern, according to a story I'd heard on NPR some months back. Sleeping through the night is a modern development resulting from electrical lighting. Our ancestors would go to bed when it got dark, sleep for about 4 hours, then spend a few of the wee hours awake (reading by candlelight or pursuing other quiet activities), going back to sleep for a few more hours until it got light outside. Bodies aren't fooled by clocks and the silly stuff we do to them!

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