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The average adult has about 21 square feet of skin.

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If all the neurons in the human body were lined up, they would stretch more than 600 miles.

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People about to have surgery must tell their health care providers about all supplements they take.

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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").

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Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.

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