Seven U.S. states are named after sovereigns - four kings and three queens.
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One million Americans, about 3,000 each day, take up smoking each year. Most of them are children.
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Colorado switched mile marker "420" to "419.99" to stop people from stealing it.
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A typical full-time worker in the US with a four-year college degree earns about $50,000. This is 62% more than a worker with only a high-school diploma.
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On average, someone in the US suffers a stroke every 40 seconds; someone dies every 3 minutes from stroke.
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Although African-Americans make up only 13% of the U.S. population, they accounted for one half of the estimated new HIV/AIDS diagnoses in 2004.
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There is a county in California called Yolo.
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