In 1700s, the deer skin was a common medium of exchange between the trading settlers and the native Red Indians in America. This is how a buck became a slang for a dollar.
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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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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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According to some estimates, Americans are sitting on $30 billion worth of unredeemed gift cards.
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The United States has paved enough roads to circle the Earth over 150 times.
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The average American spends a third of their overall time online playing games and using social networks.
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Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
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Approximately 4 to 5% of the U.S. population has one or more clinically significant phobias in a given year. Specific phobias occur in people of all ages. The average age of onset for social phobia is between 15 and 20 years of age, although it can often begin in childhood.
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