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Old 01-30-11, 10:53 PM   #10
Growler
A long way from the sea
 
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The link is based on a study I heard about a few years ago, in which a person confined to a cave and absent a clock was left to their own devices for a month or maybe longer. They had anything they needed, just no access to sunlight or any chronometer. By the end of the period of study, they were running on approximately a 26 hour "internal" clock. (It's been awhile since I heard the report - several years, so my memory's probably off on several aspects. A quick G-search gave me the link above.)

Anyway, I thought it was cool. The OP and his article made me think of the study.
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