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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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Everyone has one nostril that is larger than the other.
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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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On average, the stomach produces 2 L of hydrochloric acid per day.