Elementary Physics in the Cellular Automaton Universe
  General relativity is a mathematical model that uses sophisticated geometry to describe simple physics. It agrees with experiment in the few tests that can be made, but the whole edifice is not physics. Instead of using observations to test that model, I derive a simple empirical model of elementary physics and cosmology from the observations. The observations imply that the universe is a finite cellular automaton; that there is no curved space; that fundamental particles are massless; that "massy" particles, including electrons, are composed of fundamental particles; that gravitational mass is inertial mass; that black holes are made from neutrons compressed into bosons; that the universe was produced from cold compressed particles, not radiation; and that the universe is not expanding. 
Robert L. Kurucz (Harvard-Smithsonian Center for Astrophysics)