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Did you know?
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.
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The horizontal fraction bar was introduced by the Arabs.
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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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There are approximately 3 million unintended pregnancies in the United States each year.