Sometimes I think about the nature of an exanding universe. What makes this more interesting is that it is not only expanding, but it expanding at greater and greater speeds. How can this be possible? With all that gravity out there you would think things would be slowing down and starting to contract eventually.
Well there has to be a force that is pushing things apart right? Some believe there are some sort of mini-explosions (for lack of a better expression) in space that are releasing energy and slowly pushing things away.
I'd like to theorize however that there is a force out there that repels to pieces of matter. We will call this the Geiger Force (It's my theory so I can call it whatever I choose). This force would be so weak, that we wouldn't have a way of measuring it currently. This Geiger Force would diminish the further away two pieces of matter where from each other. However when compared to gravity, the percentage loss would be less. If 2 pieces of matter where traveling away from each other, they would get to a point where the Geiger Force is greater than that of gravity and they would start pushing each other. While this new force would still be growing weaker, the net force difference from weaker gravity would continue pushing pieces of matter indefinately.
With this mix of gravity and Geiger Force, you could see how it is more likely for a universe to become "lumpy" and non-symetrical.
Of course all things are relative. There's a good chance that Geiger Force is just a whimsical thought and that all matter is actually fading, and getting smaller. In this case, the universe isn't expanding, our perspective is just shrinking. This doesn't sound very likely as all matter would have shrink at the same rate over time, and time varies depending on its speed. So unless there is a hidden dimension where there is some subspace time constant, this theory probably isn't valid. However in case I'm wrong, I'm calling this Geiger Shrink!