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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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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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Blood is approximately twice as thick as water because of the cells and other components found in it.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.