This isn't a proper representation of science. String theory, parallel universes, etc., are not accepted by science, because there is no way to test these ideas. Science requires that those solutions we have for how things work (theories) be able to be tested. These other ideas are ... ideas. That branch of physics is called "theoretical physics" and depends on mathematical models and assumptions that are outside of the process that science uses to create theory. (I know the naming is a mess.) Scientific American has an article that points out that there are a QUADRILLION string theories that could possibly explain our current universe. And, that's just the ones where there are ten (or is it eleven) dimensions. And, NONE of them an be tested. The article is easy to find because of that word in the title.