National Geographic News, Reporting Your World Daily

Thursday, October 28, 2010

Photo: Early Birds, Night Owls: Blame Your Genes


Email to a Friend	<< Back to Full Story

Mornings can be hard for night owls—and the "alarm clocks" in our skin cells might be part of the reason, a new study says.

Researchers found that preferences for when people wake and go to sleep is encoded in their genes and the molecules of skin cells.

Photograph by Jason Homa/Getty Images