Is is possible that the expansion of the universe is a large-scale negative curvature of spacetime? My picture is that this large-scale curvature is like gravity but proportional to the mass of the universe and increasing with distance from each observer. Negative large-scale curvature is mentioned in some cosmological models such as Mixmaster. The beauty of the model is that it has some predictive results and also that it leads to an interesting picture of the early universe. Predictions include acceleration in the expansion of the universe due to equivalence and potentially observable structure characteristics of the universe. The intersting picture this leads to of the early universe is that the early universe exists in a plasma, infinately curved spacetime and that a phase transition occurs due to quantum fluctuations in this 'outside of our universe' perfect state. Matter-energy gravitationally pull together and polarize direction in spacetime. The predictive structure would be foamlike large structures because the way the universe forms would be different than purely from kenetic energy alone. Computer models, therefore, could help prove or disprove the model.

What do you think?