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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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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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Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.
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About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.
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Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.