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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.
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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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In 2006, a generic antinausea drug named ondansetron was approved. It is used to stop nausea and vomiting associated with surgery, chemotherapy, and radiation therapy.