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Did you know?
More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
Did you know?
There are approximately 3 million unintended pregnancies in the United States each year.
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There are 60,000 miles of blood vessels in every adult human.
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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.
Did you know?
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.