I have had serious doubts about string theory ever since I read Brian Green's "The Elegant Universe". He explained it in pretty good detail, except that nobody could figure out how to make it apply to the universe as it is. All they had was a huge bunch of possible universes. And since then nobody has been able to come up with anything better. I think the only thing they ever came up with that seemed to intersect with this universe was that it had a spin 2 particle, which matches what QM theorists have said the graviton would have. Unless they come up with something more than that they are going to have a hard time convincing me.

Bill Gill

C is not the speed of light in a vacuum.
C is the universal speed limit.