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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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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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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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No drugs are available to relieve parathyroid disease. Parathyroid disease is caused by a parathyroid tumor, and it needs to be removed by surgery.