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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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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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Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.
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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.