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Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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On average, the stomach produces 2 L of hydrochloric acid per day.