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From: wcalvin@milton.u.washington.edu (William Calvin)
Newsgroups: sci.bio,sci.misc
Subject: Re: 25 hr day
Message-ID: <4982@milton.u.washington.edu>
Date: 12 Jul 90 05:07:59 GMT
References: <33843@ut-emx.UUCP>
Organization: University of Washington, Seattle
Lines: 10

The free-wheeling sleep-wakefulness pattern for many humans deprived
of "zeitgeibers" (sync signals) is indeed about 25 hours.  See
articles in Scientific American and such.
        The Earth may rotate at 24 hours between sunrises, but the
time between moonrises is more like 25 hours -- and thus the time
between low tides and the major tidal currents.
  William H. Calvin
  Univ. of Washington      wcalvin@well.sf.ca.us
  Biology NJ-15         wcalvin@u.washington.edu
  Seattle WA 98195    206/328-1192  206/543-1648