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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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The top 10 most important tips that will help you grow old gracefully include (1) quit smoking, (2) keep your weight down, (3) take supplements, (4) skip a meal each day or fast 1 day per week, (5) get a pet, (6) get medical help for chronic pain, (7) walk regularly, (8) reduce arguments, (9) put live plants in your living space, and (10) do some weight training.
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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
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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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The horizontal fraction bar was introduced by the Arabs.
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