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60 minutes. The science of sleep. Part 2

Summary: June 15, 2008 - Scientists are discovering that sleep is far more critical to human health than previously believed and have linked sleep deprivation to serious problems such as diabetes, obesity a...

June 15, 2008 - Scientists are discovering that sleep is far more critical to human health than previously believed and have linked sleep deprivation to serious problems such as diabetes, obesity and heart disease. Lesley Stahl reports.