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Did you know?
The average office desk has 400 times more bacteria on it than a toilet.
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There are more sensory neurons in the tongue than in any other part of the body.
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Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.
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The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.