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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Patients who have undergone chemotherapy for the treatment of cancer often complain of a lack of mental focus; memory loss; and a general diminution in abilities such as multitasking, attention span, and general mental agility.
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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.
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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.