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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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There are more sensory neurons in the tongue than in any other part of the body.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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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.
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The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.