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Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.
Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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.
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.