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There are approximately 3 million unintended pregnancies in the United States each year.
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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
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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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There are 20 feet of blood vessels in each square inch of human skin.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.