I know it seems to violate common sense, but bare with me for a moment. Recent findings of negative kelvin temperatures that are hotter than infinitely hot temperatures got me to thinking; what is the difference between infinity and negative infinity. Is there one? What happens when you go past infinity? Maybe the answer is that you start back over at negative infinity. So if our Universe is infinite as some postulate, and it's still expanding, what if it is racing back towards a singularity? That could be the reason behind the mysterious dark energy. As the Universe grows infinitely larger, all matter is getting closer to being infinitely close and therefore starts accelerating towards the relative center. It's possible that the "expansion" of the Universe is just relative to us as observers inside the Universe, but perhaps to an observer outside the Universe, it could appears as though we are collapsing at an accelerating rate.