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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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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
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Everyone has one nostril that is larger than the other.
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Illicit drug use costs the United States approximately $181 billion every year.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.