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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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If you could remove all of your skin, it would weigh up to 5 pounds.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.
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Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.