Einstein"s theories of relativity and the resulting E = MC^2, although extremely important to physics, was not his greatest insight. His idea that time is not fixed, that it can run infinitely slow or possibly infinitely fast was the most important. If there was a Big Bang, that suggests at one second after the BB then the universe had an edge. If that is true then the universe should have an edge now. The universe is expanding at an accelerated rate. Doesn't that imply that time at the edge now is much faster than at the BB?