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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).
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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.