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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.
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Many of the drugs used by neuroscientists are derived from toxic plants and venomous animals (such as snakes, spiders, snails, and puffer fish).
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.