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Did you know?
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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About 60% of newborn infants in the United States are jaundiced; that is, they look yellow. Kernicterus is a form of brain damage caused by excessive jaundice. When babies begin to be affected by excessive jaundice and begin to have brain damage, they become excessively lethargic.
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The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.