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Posted by SleepyRick on February 05, 1998 at 15:02:51:

In Reply to: sleep and light posted by Doug on January 31, 1998 at 12:04:25:

I found an article at the NY Times web site by searching for keywords "sleep" AND "light" and "knee". The full URL is below.

http://search.nytimes.com/search/daily/bin/fastweb?getdoc+site+site+24833+1+wAAA+jet%7Elag%7Eand%7Elight

They used fiber optics to shine a blue (not ultraviolet) light on the back of the knee and found that it shifted the body's internal time clock, they think because the light affected some compound in the blood, which then travelled to the brain and shifted the timer there.

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