I have a theory, please correct me if I'm wrong. What if the big bang didn't start the universe from expanding? If we were speed up to the rate the universe is accelerating in, where would we be? How did it start? Well I have an answer, I am not sure about the big bang theory being correct, but what i'm having difficulty is that the shape and size of how it blew up. I think the universe doesn't have time in it's equation, though it has a speed. Now think about this, if you were to time travel back in time trying to fix a problem in the past (Like telling yourself not to ask a certain person to marry you, because it work out in the future). Where will you turn up if you were go back to the present? The Answer: The Universe isn't the only universe, like a molecule isn't the only molecule (There are many others). So, if you time travel, your not actually time travelling your Universe travelling.