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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.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.