"Aún no sabemos si los universos paralelos existen": Christophe Galfard, el discípulo de Stephen Hawking, les responde a nuestros lectores You might have by now done the quiz before. Consequently you'll be able to not start off it yet again. Quiz is loading... You must sign up or sign up https://www.youtube.com/watch?v=5LF34uf-LC4