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There are more nerve cells in one human brain than there are stars in the Milky Way.
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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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Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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People about to have surgery must tell their health care providers about all supplements they take.