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Did you know?
Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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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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Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.