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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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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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Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.