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    The Louisiana Purchase  
The Louisiana Purchase was the acquisition by the United States of America in 1803 of 828,000 square miles (2,144,000 square kilometers or 529,920,000 acres) of France's claim to the territory of Louisiana. The U.S. paid 50 million francs (...
 
    Buffalo Bill  
William Frederick "Buffalo Bill" Cody was an American soldier, bison hunter and showman. He was born in the Iowa Territory (now the American state of Iowa), near LeClaire. He was one of the most colorful figures of the American Old West, an...
 
    Yellowstone, First National Park in the World  
Yellowstone National Park is a national park located primarily in the U.S. state of Wyoming, although it also extends into Montana and Idaho. It was established by the U.S. Congress and signed into law by President Ulysses S. Grant on March...
 
    Edwin Land, Inventor Polaroid  
Edwin Herbert Land was a American scientist, inventor, and industrialist. While studying physics at Harvard in the 1920s he became interested in the polarization of light. He developed a new polarizing material, which he called Polaroid, an...
 
       
 
         
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