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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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Allergies play a major part in the health of children. The most prevalent childhood allergies are milk, egg, soy, wheat, peanuts, tree nuts, and seafood.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.