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Sleepless in America: The photos

November 29, 2011, at 1:03 PM
If you're the get-up-and-go type, you may have a specific gene that allows you to sleep for a significantly shorter periods of time than other people, new research suggests.

If you're the get-up-and-go type, you may have a specific gene that allows you to sleep for a significantly shorter periods of time than other people, new research suggests. Photo: Erik Isakson/Tetra Images/Corbis

 
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