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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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Human kidneys will clean about 1 million gallons of blood in an average lifetime.

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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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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

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The average office desk has 400 times more bacteria on it than a toilet.

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