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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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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.
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The average adult has about 21 square feet of skin.
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.