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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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There are 20 feet of blood vessels in each square inch of human skin.
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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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Medication errors are more common among seriously ill patients than with those with minor conditions.
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Green tea is able to stop the scent of garlic or onion from causing bad breath.