One hundred years of the cosmological constant: from “superfluous stunt” to dark energy Cormac O’Raifeartaigh, Michael O’Keeffe, Werner Nahm and Simon Mitton Eur. Phys. J. H, 43 1 (2018) 73-117 Published online: 16 March 2018 DOI: 10.1140/epjh/e2017-80061-7