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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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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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Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.
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There are more sensory neurons in the tongue than in any other part of the body.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.