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Thomas Alva Edison (February 11, 1847 – October 18, 1931) was an American inventor and businessman who has been described as America's greatest inventor. He developed many devices in fields such as electric power generation, mass communication, sound recording, and motion pictures. These inventions, which include the phonograph, the motion picture camera, and early versions of the electric light bulb, have had a widespread impact on the modern industrialized world. He was one of the first inventors to apply the principles of organized science and teamwork to the process of invention, working with many researchers and employees. He established the first industrial research laboratory.Edison was raised in the American Midwest; early in his career he worked as a telegraph operator, which inspired some of his earliest inventions.
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Pisa ( PEE-zə, Italian: [ˈpiːza] (listen) or [ˈpiːsa]) is a city and comune in Tuscany, central Italy, straddling the Arno just before it empties into the Ligurian Sea. It is the capital city of the Province of Pisa. Although Pisa is known worldwide for its leaning tower (the bell tower of the city's cathedral), the city of over 91,104 residents (around 200,000 with the metropolitan area) contains more than 20 other historic churches, several medieval palaces, and various bridges across the Arno.
Dordrecht (UK: , US: , Dutch: [ˈdɔrdrɛxt] (listen); colloquially Dordt [dɔrt] (listen)),...
Heidelberg ( HY-dəl-burg, German: [ˈhaɪdl̩bɛʁk] (listen)) is a university town in the German...
Bochum ( BOH-khuum, also US: BOH-kəm, German: [ˈboːxʊm] (listen); Westphalian: Baukem) is the...