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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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There are approximately 3 million unintended pregnancies in the United States each year.
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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
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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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Inotropic therapy does not have a role in the treatment of most heart failure patients. These drugs can make patients feel and function better but usually do not lengthen the predicted length of their lives.
![People have seen patterns in the stars since ancient times.[5] This 1690 depiction of the constellat](https://biology-forums.com/gallery/47/medium_12359_26_01_13_3_44_40.png)

