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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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Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.