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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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The longest a person has survived after a heart transplant is 24 years.
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The oldest recorded age was 122. Madame Jeanne Calment was born in France in 1875 and died in 1997. She was a vegetarian and loved olive oil, port wine, and chocolate.
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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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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.