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Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.