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There are more bacteria in your mouth than there are people in the world.
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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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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.
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There are approximately 3 million unintended pregnancies in the United States each year.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.