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According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.
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Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.
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The horizontal fraction bar was introduced by the Arabs.
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There are more bacteria in your mouth than there are people in the world.
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Everyone has one nostril that is larger than the other.