Sleep Longer, Live Longer?

An extra hour in bed may save your life, Web MD reports. Every extra hour of sleep over six hours a night has been linked to a significant drop in people's chances of developing a build-up of calcium in their arteries, potentially cutting their risk of heart attack, according to a new study.

"One hour more of sleep decreased the estimated odds of calcification by 33%," said the author of the study in the Journal of the American Medical Association. He doesn't have a theory about how sleep may reduce calcium levels in the arteries, and called for more research to explore the link. 
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