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The shortest mature adult human of whom there is independent evidence was Gul Mohammed in India. In 1990, he was measured in New Delhi and stood 22.5 inches tall.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
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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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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."