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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.