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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
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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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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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Everyone has one nostril that is larger than the other.
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There are 20 feet of blood vessels in each square inch of human skin.