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Everyone has one nostril that is larger than the other.
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To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.