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There are 20 feet of blood vessels in each square inch of human skin.

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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

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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.

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Your heart beats over 36 million times a year.

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Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.

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