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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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There are 20 feet of blood vessels in each square inch of human skin.
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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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