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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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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.