8 Nikola Tesla : Nikola Tesla is known to be one of the greatest scientists of all time, because of his many inventions, and contributions to science. He invented many revolutionary inventions before other scientists did, but didn’t get the credit. He contributed greatly to creation of alternating current. Tesla emigrated to the united states in 1884 and began working for Thomas Edison. His greates inventions were the AC Motor, the Tesla coil, radio, the remote control. Some of Tesla’s greatest inventions he never got around to making were long-range wireless energy transfer, humanoid robots, a death ray, better airships, and super electrotherapy.