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The horizontal fraction bar was introduced by the Arabs.
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Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).
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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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Colchicine is a highly poisonous alkaloid originally extracted from a type of saffron plant that is used mainly to treat gout.
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.