From mcnees https://twitter.com/mcnees on Twitter: Dirac's paper on the quantum emission and absorption of radiation, advancing the first truly quantum theory of electrodynamics, was submitted to the Royal Society # in 1927. It is considered by many to mark the beginning of Quantum Field Theory. http://rspa.royalsocietypublishing.org/content/114/767/243 https://twitter.com/mcnees/status/959477250281353217/photo/1 https://chirp.cooleysekula.net/attachment/47948