The horizontal fraction bar was introduced by the Arabs.
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People about to have surgery must tell their health care providers about all supplements they take.
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Walt Disney helped combat malaria by making an animated film in 1943 called The Winged Scourge. This short film starred the seven dwarfs and taught children that mosquitos transmit malaria, which is a very bad disease. It advocated the killing of mosquitos to stop the disease.
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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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Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.
