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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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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A Native American tribe in South Dakota collects bottle caps left by campers, using them as currency. Several banks in the area now recognize the caps as legal tender.
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In 1700s, the deer skin was a common medium of exchange between the trading settlers and the native Red Indians in America. This is how a buck became a slang for a dollar.
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Saint Augustine, Florida, is the oldest European settlement in North America.
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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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