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Did you know?
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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There are more bacteria in your mouth than there are people in the world.
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Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).
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The horizontal fraction bar was introduced by the Arabs.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.