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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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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One million Americans, about 3,000 each day, take up smoking each year. Most of them are children.
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Each year, around 24,000 Americans are bitten by rats!
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Forty percent of American adults cannot fill out a bank deposit slip correctly.
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The United States has paved enough roads to circle the Earth over 150 times.
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The United States does not have an official language.
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