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The horizontal fraction bar was introduced by the Arabs.
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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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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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As many as 20% of Americans have been infected by the fungus known as Histoplasmosis. While most people are asymptomatic or only have slight symptoms, infection can progress to a rapid and potentially fatal superinfection.
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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.