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Did you know?
Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.
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Medication errors are three times higher among children and infants than with adults.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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There are 20 feet of blood vessels in each square inch of human skin.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.