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The average office desk has 400 times more bacteria on it than a toilet.
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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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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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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.