From Brian Horton, West Launceston, Tasmania, Australia
Your articles on “How to think about…” were all fascinating. But the piece on the multiverse claimed that it is not a hypothesis but is “forced upon us” (30 June, p 29). There is no evidence for a multiverse. It seems very much like the idea that the sun revolves around Earth: it makes perfect sense superficially, until you start to look closely. Then you have to bring in more and more special cases to explain exceptions until the theories become so complex that they are replaced.
