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Nikola Tesla, (born Gregorian calendar month 9/10, 1856, Smiljan, Austrian Empire [now in Croatia]—died January seven, 1943, New York, New York, U.S.), Serbian yankee artificer and engineer United Nations agency discovered and proprietary the rotating force field, the premise of most alternating-current machinery. He conjointly developed the three-phase system of electrical power transmission. He immigrated to the us in 1884 and sold  the patent rights to his system of alternating-current dynamos, transformers, and motors to inventor. In 1891 he fancied the Tesla coil, Associate in Nursing coil wide employed in radio technology. Tesla was from a family of Serbian origin. His father was Associate in Nursing Orthodox priest; his mother was untutored however very smart. As he matured, he displayed exceptional imagination and creativeness further as a poetic bit. Training for Associate in Nursing engineering career, he attended the Technical University at city, Austria, and also the Un

James Dewey Watson is associate degree yank life scientist, life scientist and biologist. In 1953, he co-authored with biochemist the tutorial paper proposing the helix structure of the DNA molecule. Watson, Crick and biochemist were awarded the 1962 honour in Physiology or medication "for their discoveries regarding the molecular structure of nucleic acids and its significance for data transfer in living material". In succeeding years, it's been recognized that Rosalind Franklin failed to receive full credit for her contributions to the invention of the helix structure. Watson earned  degrees at the University of Chicago (BS, 1947) and Hoosier State University (PhD, 1950). Following a post-doctoral year at the University of Copenhagen with bandleader Kalckar and Ole Maaløe, Watson worked at the University of Cambridge's physicist Laboratory in European country, wherever he 1st met his future collaborator biochemist. From 1956 to 1976, Watson was on the school of