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The average adult has about 21 square feet of skin.
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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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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).
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Medication errors are three times higher among children and infants than with adults.