i'm quite vague on today's modern theories of the universe so wondered if anyone could clear up some questions ive always had i heard somewhere that math can prove there are as many has 11 dimensions is that right? and what would these dimensions be like in layman terms. if i understand right, time is the 5th dimension? how and what is that exactly does a copy of us exist in a parrallel world? if we time traveled wouldnt it be like in the tv show sliders, like you couldnt kill your own grandfather in your world but rather go to a parallel and do it? if you make a decision, does it spawn another parralel to a world where you made the other decision in an infinite tree like fashion for every living thing since the beginning or does that have no validity?