They now say that the universe is expanding and accelerating. It's not only getting bigger but bigger faster! Now, everyone knows, as matter approaches the speed of light, it gets heavier and closer to infinite mass. This is why we need such huge, powerful machines to accelerate microscopic particles.(particle accelerators) The most heaviest thing in the universe is the black hole. The curious thing about the black hole is that it has an event horizon, the point of no return. Every thing, even light, that enters the event horizon, never comes out, and on top of this, time goes all wonky because of the intense gravitation. If an observer was to fall into an event horizon, time would seem normal to them but when they look back to where they were, all the stars would be supernova-ing and they would witness the universe come to an end! When a gun is shot, the bullet starts to slow (due to friction) after the initial big bang. When you drop a ball from a tree, it accelerates to the ground(due to gravity). Is the whole universe falling out, toward a future singularity? The Universe (continued?) Now, where are we? The farthest points of the universe are accelerating faster and faster and thus growing in mass until it reaches the density of the black hole and creates an event horizon. As the "farthest points in space" are all around us, an event horizon will surround the universe. This will become the maximum area of the universe, encapsulating it, and all thing inside will continue to accellerate toward that outerwall (event horizon) until nothing is left within . As Einstein said "without things there is no time or space." THE END This makes more sense, I think, then dark energy or vacuume energy. I guess that if an event horizon surounds the universe then we could be inside a giant black hole.