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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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More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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Blood is approximately twice as thick as water because of the cells and other components found in it.