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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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The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.

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Approximately 500,000 babies are born each year in the United States to teenage mothers.

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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

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Thyroid conditions may make getting pregnant impossible.

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