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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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Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
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If you could remove all of your skin, it would weigh up to 5 pounds.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.