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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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The horizontal fraction bar was introduced by the Arabs.
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Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.
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There are more bacteria in your mouth than there are people in the world.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.