Posted: May 04, 2010 12:06 pm
I've read this book and, as a layperson, would recommend it for anyone who wants an accessible introduction to string theory.
The reason claimed by Brian Greene for ST's predictions not yet being testable is due to the current technological limitations not allowing us to see on the microscopic scales explored by the theorists. Nevertheless, as far as I'm aware it is still the only theory that successfully unites quantum physics and gravity. Also, I believe the LHC's tests will include searching for extra dimensions, so perhaps when it's properly up and running, we'll finally get some answers.