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In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.
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More than 4.4billion prescriptions were dispensed within the United States in 2016.
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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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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.