The first female self-made millionaire in America was a black woman.
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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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The first semi-permanent settlements appeared in Florida around 5000 B.C.
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During the Cold War, the US had planned to detonate a nuclear weapon on the moon.
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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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