Richard Feynman was an American theoretical physicist who made significant contributions to quantum electrodynamics. He was awarded the Nobel Prize in Physics in 1965, sharing the honor with Julian Schwinger and Shin'ichirō Tomonaga for their work in this field, which had important effects on the understanding of elementary particles. Feynman is also recognized for his development of the path integral formulation of quantum mechanics and his research on the superfluidity of supercooled liquid helium. He introduced Feynman diagrams, a visual tool for representing interactions between subatomic particles, which has become a standard method in particle physics.