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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).
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Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.