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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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It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.
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If you could remove all of your skin, it would weigh up to 5 pounds.
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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
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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.