Which action model of the Universe do you endorse and why? Static Model, Big Bang Model, or Big Bounce model of the Universe?? Current Big Bang theory supposes Inflation which is an episode of exponential expansion thought to have occurred fractions of a second after the big bang. It is needed to explain, among other things, why the universe today has the geometry it does, but explaining what triggered inflation is tricky. Quote from Article: Big bounce cosmos makes inflation a sure thing "Earlier simulations showed that the big bounce creates a repulsive force and so is always followed by a period of rapid expansion that is even faster than inflation. Dubbed superinflation, this episode doesn't last long enough to replace inflation. But the pair's latest calculations show that it has a profound effect on space-time, such that no matter what the initial properties are in the early universe, superinflation "funnels" all the possible ways in which space-time can evolve towards one in which inflation is a near certainty (Physics Letters B, DOI: 10.1016/j.physletb.2010.09.058)." Currently, in the study of general relativity, there is no way of explaining why the initial conditions of the universe were what they were, you have to invent some theory or model to describe; a big bounce coupled to an big bang prehaps? A big bounce theory would indicate an oscillatory motion, with a repulsive force coupled to an attractive force, and each oscillation would always be followed by a period of rapid expansion that is even faster than current inflation models. If this is so, it is only a theory, and not predicted by current models which describe General Relativity. I do not accept this "Universal Oscillation" theory as any fact whatsoever, and, it is up for debate; there is no proof of a big bounce. All current Wilkinson Microwave Anisotropy Probe (WMAP) experiments point to a Big Bang model of the universe, in which the mathematics of General Relativity are valid.