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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.
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Everyone has one nostril that is larger than the other.
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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
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The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.
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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.