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Sleep
Considering that we spend one third
of our lives in bed, you'd think we might master the art of sleep. Yet America remains one seriously shut-eye-deprived, nap-craving country. A look at the
facts, from A to Zzzzzz's. -- SARAH VAN BOVEN
10: Average number of hours people slept per night before Thomas Edison invented the lightbulb in 1879. 6.9: Average number of hours people sleep per weeknight today. 1953: Year two University of Chicago scientists identified the Rapid Eye Movement stage of sleep, the dream state now known to be integral to good rest. 80: Percentage of the night spent in
REM sleep as a newborn. 25: Percentage of the night spent in REM sleep as an adult. 1900: Year in which Sigmund Freud published The Interpretation of Dreams, proposing that emotions buried in the unconscious surface in disguised form during sleep. 17: Percentage of people in a 2002 Sleep Foundation survey who
admitted to having fallen asleep behind the wheel in the previous year. 14: Percentage of American women who sleep with a pet in their bed. 50: Percentage of a dolphin's brain that remains awake while the other half sleeps, so the animal can periodically reach the water's surface to breathe. 264: Number of straight hours 17-year-old Randy Gardner stayed awake