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Blood is approximately twice as thick as water because of the cells and other components found in it.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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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.