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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).
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In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.