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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There are six times as many people of Irish descent living in America than in Ireland.
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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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The United States does not have an official language.
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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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50% of pizzas in America are pepperoni.
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The Procrastinators' Club of America newsletter is called Last Month's Newsletter.
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The first semi-permanent settlements appeared in Florida around 5000 B.C.
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