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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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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).