Elementary Particles and the Laws of Physics - Richard Feynman

Dick Feynman, my most favoritest physicist of the late 20th century, discusses why antiparticles, predicted by Paul Dirac, must exist for any coherent theory of modern physics using both General and Special Relativity and Quantum Mechanics. This was filmed at the 1986 Dirac Memorial Lecture, so the resolution for this video is a bit funky, but Feynman’s brilliant lecturing style more than makes up for it. Enjoy.