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There are 60,000 miles of blood vessels in every adult human.
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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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There are 20 feet of blood vessels in each square inch of human skin.
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According to animal studies, the typical American diet is damaging to the liver and may result in allergies, low energy, digestive problems, and a lack of ability to detoxify harmful substances.