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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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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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There are more sensory neurons in the tongue than in any other part of the body.