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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
There are 60,000 miles of blood vessels in every adult human.
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.
Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.
Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.