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For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.
Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.