P. A. M. Dirac, or Paul Adrien Maurice Dirac, was a British theoretical physicist known for his significant contributions to quantum mechanics and quantum field theory. Born in 1902, he formulated the Dirac equation, which describes the behavior of fermions and predicted the existence of antimatter, specifically the positron. Dirac was awarded the Nobel Prize in Physics in 1933 for his work in quantum mechanics. He was also known for his unique personality and philosophical views on the nature of science. His legacy continues to influence modern physics, particularly in the fields of particle physics and cosmology.