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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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Everyone has one nostril that is larger than the other.
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The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.
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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.