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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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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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Eating food that has been cooked with poppy seeds may cause you to fail a drug screening test, because the seeds contain enough opiate alkaloids to register as a positive.
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The average office desk has 400 times more bacteria on it than a toilet.
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The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.