In 2005, 25 percent of Americans over the age of 50 played video games, an increase from nine percent in 1999.
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Seven U.S. states are named after sovereigns - four kings and three queens.
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The United States has paved enough roads to circle the Earth over 150 times.
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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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Teddy bears were named after U.S. President Theodore 'Teddy' Roosevelt.
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