I just got done watching this show on tv. I know this will throw some of credibility out of the window automatically but please try to hear me out on this question. If there are an infinite number of parallel universes, then there are an infinite number of universes where our galaxy was not created. Which surely means any parallel universe could only be proved theoretically, because the vastness of space and infinite universes would mean we would never be able to find one by physical means. If we were looking out, and somehow could see into a different universe, we might see a cloud of particles that used to be our Milky Way, leaving us no evidence if the parallel universe we have spotted contains our galaxy. If this were the case, why are we chasing after them? And what could we learn from the existance of parallel universes in the first place? I am 19 and i am below a novice in physics, so if this just seems like random babbling it probably is. But if there is anyone who feels like answering and or putting me back in my place with an answer, I will be happy.