The first semi-permanent settlements appeared in Florida around 5000 B.C.
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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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In the US, there are quite a few cities called Gaylord.
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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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Forty percent of American adults cannot fill out a bank deposit slip correctly.
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The United States does not have an official language.
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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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Americans throw out 4.5 pounds of trash a day - twice that of 40 years ago.
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