This leads to the thought that space may have existed before the Big Bang. The proto universe before the Big Bang was then a black hole. At some point it exploded. Why? Well, if we consider Einstein's famous equation: E = mc^2, we find that the left hand side involves radiant energy that has no gravitational field while the right hand side involves mass that has a gravitational field. We conclude that when matter is converted to energy there is a corresponding decrease in the gravitational field. We know of a few examples where this process takes place; nuclear fusion and matter anti-matter annihilation. Its also possible that such a reaction can take place within a black hole. If enough matter is converted to energy the black hole's gravitational field would collapse and the black hole would explode. This would likely be a probabilistic process dependent on the mass of the black hole. Hence universe sized black holes are more likely to explode. This is not inconsistent with current cosmological ideas, which state that immediately after the Big Bang space was filled with radiant energy. For a time this energy interacted to create matter and anti-matter. A sort of balance ensued until space cooled enough that only matter anti-matter annihilation occurred. At the end (mysteriously) only matter remained. Not so mysterious if the original proto universe consisted of a black hole of "normal" matter.