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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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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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Aspirin may benefit 11 different cancers, including those of the colon, pancreas, lungs, prostate, breasts, and leukemia.
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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.