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Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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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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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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In 1864, the first barbiturate (barbituric acid) was synthesized.