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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.
Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.
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.
About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

