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The horizontal fraction bar was introduced by the Arabs.

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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

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The FDA recognizes 118 routes of administration.

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In 1885, the Lloyd Manufacturing Company of Albany, New York, promoted and sold "Cocaine Toothache Drops" at 15 cents per bottle! In 1914, the Harrison Narcotic Act brought the sale and distribution of this drug under federal control.

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There are 20 feet of blood vessels in each square inch of human skin.

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