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If you could remove all of your skin, it would weigh up to 5 pounds.
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
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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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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.