Famed physicist Nikola Tesla and Enrico Fermi are two of the most renowned scientists in history. Tesla was a Serbian-American inventor, electrical engineer, mechanical engineer, and futurist who is best known for his contributions to the design of the modern alternating current electricity supply system. Fermi was an Italian-American physicist and the creator of the world's first nuclear reactor. Both men made significant contributions to the field of physics and are remembered for their groundbreaking work.