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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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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.
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The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.