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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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Pregnant women usually experience a heightened sense of smell beginning late in the first trimester. Some experts call this the body's way of protecting a pregnant woman from foods that are unsafe for the fetus.
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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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The human body produces and destroys 15 million blood cells every second.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.