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 two credit cards for every person in the United States.
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In 1963, the US Military created an artificial ring around Earth, similar to that of the planet Saturn. The ring was made of copper needles and was used for worldwide communications in the case that the Soviets disabled all other methods of communication.
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Theodore Roosevelt read at least one book every day.
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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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