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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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.
In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).
In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.