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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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The average adult has about 21 square feet of skin.
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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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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.