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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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There are approximately 3 million unintended pregnancies in the United States each year.
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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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According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.