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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.
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There are more sensory neurons in the tongue than in any other part of the body.
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Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.