I've been reading quite a bit of popular science books recently, one notable one is "The Elegant Universe" by Brian Greene (I hope he's not a relative of yours Oshyan), which I thought was shit. It was supposed to explain why string theory is the answer to how to couple all the forces of nature into one equation. But rather than explaining how it does this, it just repeats the mantra that it does. Unfortunately, there is no string equation. In fact string theory can't predict anything testable because of this 'multiverse' get out clause, which says all solutions are possible, you just have to find the right universe that we live in. Which is hubris. Peter Woit has written a very good book called "Not Even Wrong" and has an extremely good blog of the same name, that posits why the multiverse is a red herring, that too much physics funding has been attributed to it for over 40 years, with out it making a single testable prediction. SUSY (Super Symmetry) was the latest string theory failure that has been proven not to exist at the LHC in the last year, on which most string theorists had predicted it would.
Something I find fascinating, is that a photon has no self concept of time.