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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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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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Excessive alcohol use costs the country approximately $235 billion every year.
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.