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Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
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The average office desk has 400 times more bacteria on it than a toilet.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.