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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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The average office desk has 400 times more bacteria on it than a toilet.
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Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).
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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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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.