Colorado switched mile marker "420" to "419.99" to stop people from stealing it.
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Teddy bears were named after U.S. President Theodore 'Teddy' Roosevelt.
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The United States does not have an official language.
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The first semi-permanent settlements appeared in Florida around 5000 B.C.
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There are six times as many people of Irish descent living in America than in Ireland.
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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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