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Approximately 500,000 babies are born each year in the United States to teenage mothers.

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People about to have surgery must tell their health care providers about all supplements they take.

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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.

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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

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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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