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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.
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During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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On average, the stomach produces 2 L of hydrochloric acid per day.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.