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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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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.