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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

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Your chance of developing a kidney stone is 1 in 10. In recent years, approximately 3.7 million people in the United States were diagnosed with a kidney disease.

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Nitroglycerin is used to alleviate various heart-related conditions, and it is also the chief component of dynamite (but mixed in a solid clay base to stabilize it).

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