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Did you know?
There are 60,000 miles of blood vessels in every adult human.
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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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The average office desk has 400 times more bacteria on it than a toilet.
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There are approximately 3 million unintended pregnancies in the United States each year.