RTB’s Jeff Zweerink explains why we should exercise caution when considering whether the multiverse is science. While there is a legitimate place for the multiverse in scientific discussion, we must always keep in mind that at the fundamental level the multiverse is not science. Zweerink quotes eminent theoretical cosmologist, George F. R. Ellis, who reminds us that the multiverse is really just “scientifically based philosophical speculation.” In other words, it’s just a science-flavored idea.