think it would be great to come up with ideas that people were still trying to improve upon in a century. That is the situation with Einstein's structure of ideas, especially the general theory of relativity. Physicists are probing its limits not in the hope that they can somehow over come it and erase it from the blackboard of history -- that won't happen --but in the expectation that in time somebody will do to Einstein what he did to Newton. Roughly speaking, Einstein showed that Newton was right about a special case within a broader situation. Outside of this special case (a stable framework for observations, within which objects move at slow velocities) things work in non-Newtonian ways. Could even Einstein's understanding of physics turn out to be a special case within a broader situation. It is almost certain that this WILL happen. The question is: where do the Einsteinian rules break down? Find that out, and come up with the broader theory, and your name my frie...