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About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.
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Blood is approximately twice as thick as water because of the cells and other components found in it.
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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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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.