One thing that continually irritates me, is the simple notion that there is only ONE universe. How can we POSSIBLY EVEN THINK that there is only one universe? To put this in pespective, look at the human body. It is comprised of billions of cells, and is a "universe" unto itself. However, It's not infinite, it DOES INDEED have an ending point, that being "the outside of the body". IF YOU SUBSCRIBE TO THE NOTION, that the human body "is the universe", then how do you explain the distance between TWO human bodies in real time? Therefore,to follow my point, it is possible for two universes to exist side by side. Of course, we will never see them, for they are "outside of the body"...NOW, what is "outside of the body"? quite simple...space...but a different kind of space then we are used to thinking of. It would HAVE TO BE A PHYSICAL BARRIER, to follow the laws of physics...again using the human body as an example, size IS finite. We already know that. Therefore, to make a rudimentary comparison, picture the universe as a human body, our planet being but one molecule, or atom of such. Expand outwards, to the outside of this human body. THAT is the end of the universe that WE KNOW. THAT is what contains "SPACE", as our limited knowledge can define "SPACE". Now, when you emerge from this "human body", if you will, you encounter a barrier surrounding it, (IE., atmosphere, for example), that defines something completely different. That, my friends, is where "SPACE" ends, and something unknown to us takes over. Call it a different dimension, if you will. We will never know the answer to this question. Perhaps that is why there exists the different religions of the world. They all seek to explain what is "outside of the body"...