Biological Clocks

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Uploaded by on Mar 8, 2010

Uncovering the molecular secrets of what makes us tick
From bacteria to humans, the biological clocks in living things help them determine when to eat, when to sleep, even how to avoid becoming some other creature's lunch.

Many humans are best acquainted with their clocks when they are out of whack: like after a long transcontinental flight that flip-flops day and night.

"It's a fundamental adaptation that helps organisms anticipate the daily light-dark cycle on the planet," explains University of Georgia geneticist Jonathan Arnold.
For more on this, go to http://www.nsf.gov/news/special_reports/science_nation/index.jsp

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