Toward the end of a Washington Post article about sleep:
http://www.washingtonpost.com/wp-dyn/articles/A44855-2002May20.html
is a report of an experiment with people living without clocks or
artificial lighting (or the Internet!). The subjects went to sleep
early, into a deep sleep for about four hours, followed by a
middle-of-the-night "watch" of about two hours of calm wakefulness,
followed by another stretch of deep sleep. This suggests that our ideal
of 8 straight hours dead-to-the-world might not be inherent even for
adults, which might be a useful insight into why some babies are slower
to adapt to it.
Margaret Wills, LLLL, IBCLC
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