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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.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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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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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.