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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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Everyone has one nostril that is larger than the other.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.