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Did you know?
Blood is approximately twice as thick as water because of the cells and other components found in it.
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In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).
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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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Cyanide works by making the human body unable to use oxygen.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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