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