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Did you know?
Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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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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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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Asthma cases in Americans are about 75% higher today than they were in 1980.
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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.