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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
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The average office desk has 400 times more bacteria on it than a toilet.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.
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Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.