Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.
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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
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The longest a person has survived after a heart transplant is 24 years.
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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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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
Burchell's zebra (E. q. burchellii) in Etosha National Park, Namibia