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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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As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.
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The average adult has about 21 square feet of skin.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.