The standard Big Bang model of cosmology comes from Einstein's general the-ory of relativity, which describes gravity and spacetime, together with the assump-tions that the universe looks the same in every direction and that it is spatiallyhomogeneous. The resulting standard model of cosmology successfully describes theuniverse for a number of observations, but it also has several important problems(see, e.g., [1]). In particular, it cannot explain why the universe appears to be al-most perfectly flat and homogeneous, but more importantly, it cannot explain theformation of structures in our universe.