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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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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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There are 60,000 miles of blood vessels in every adult human.
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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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According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.