Parallel Universe

Scientists now believe that we do not only live in a universe but a multiverse. Our multiverse s are no longer believed to be compposed of particles but string like substances that interlink parrallel universes. These difforent worlds originated from the big bang. Each universe is very similar physically but function difforently. For example, in a difforent universe that is connected to ours could have had evolution take a difforent turn and humans would look a little difforent or not even exist... dinosaurs could still be alive in another one, and in a seperate universe the United states might have never seperated from Brittain. This theory blows my mind! is it possible? Anything is possible. What do you think?