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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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There are more sensory neurons in the tongue than in any other part of the body.

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Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

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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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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%

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