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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 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 first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.
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The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.
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Excessive alcohol use costs the country approximately $235 billion every year.