I've been hearing a lot of talk lately regarding the validity of String Theory. There have been a lot of people that I have met that seem to think that the entire theory is completely wrong. Is there something I've been missing out on? I've always been under the impression that string theory is a valid way of describing the universe, apart from the fact that it can't really be proven directly. My argument is that just because we don't yet have the technology to verify it doesn't mean that it isn't accurate. So my question is this: has there been some kind of development in the past few years or so that has uncovered some kind of flaw in the theory? Thanks.