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The horizontal fraction bar was introduced by the Arabs.
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As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.
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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.