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The familiar sounds of your heart are made by the heart's valves as they open and close.
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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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The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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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.