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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 (... |
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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... |
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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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