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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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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
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The horizontal fraction bar was introduced by the Arabs.
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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.