What if? Exploring the multiverse through Euclidean wormholes Mariam Bouhmadi-López, Manuel Krämer, João Morais and Salvador Robles-Pérez Eur. Phys. J. C, 77 10 (2017) 718 Published online: 28 October 2017 DOI: 10.1140/epjc/s10052-017-5279-6