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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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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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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Recent studies have shown that the number of medication errors increases in relation to the number of orders that are verified per pharmacist, per work shift.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.