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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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Cyanide works by making the human body unable to use oxygen.
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Medication errors are more common among seriously ill patients than with those with minor conditions.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.