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The U.S. Preventive Services Task Force recommends that all women age 65 years of age or older should be screened with bone densitometry.
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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
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Cyanide works by making the human body unable to use oxygen.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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There are 20 feet of blood vessels in each square inch of human skin.