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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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If you could remove all of your skin, it would weigh up to 5 pounds.
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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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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.