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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.
Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.
The FDA recognizes 118 routes of administration.
There are 20 feet of blood vessels in each square inch of human skin.
Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.