"Aún no sabemos si los universos paralelos existen": Christophe Galfard, el discípulo de Stephen Hawking, les responde a nuestros lectores You've now completed the quiz just before. For this reason you can not start it again. Quiz is loading... You need to register or join to begin the quiz. You https://www.youtube.com/watch?v=5LF34uf-LC4