The theory revolves around the idea that parallel universes are alternate realities to our current existence. Some physicists believe that there could be many parallel universes super-imposed in our space and time. The belief in parallel universes is based on the phenomena observed in quantum physics where a particle can be in different places at the same time. There are also theories and equations that make sense only in the use of an analogy that parallel universes exist. Interpretation of Quantum Mechanics: http://www.benbest.com/science/quantum.html Heisenberg’s uncertainty principle asserts that it is impossible to specify simultaneously the position and momentum of a particle, such as an electron, with precision. And to observe its speed and motion or its position destroys what we observe. Until it is observed, that particle exists in all its possible states, and perhaps there are parallel universes in which all these possible states actually exist. "The Schrödinger’s cat in its box is either alive, dead, or in between. In this universe you would open the box and find the cat dead, but in parallel universes you would open the box and the cat would be alive or in between." An article on Heisenberg’s uncertainty principle: http://www.halexandria.org/dward159.htm The possibility of there being parallel universes leaves me to wonder about many things, one of which is the idea of reincarnation. If we are simply tools or products of an "evolving god" our physical reality would be constant, at least until we evolve beyond the physical state. So we could be reincarnated, but could it be possible that in the event of death we simply pick up in an alternate reality? Or perhaps we are experiencing everything on many different levels within these alternate worlds at all times. Many times, mediums who claim to channel the spirits of those who have died say that we continue on after death in an existence similar to what we experience now. As with all spiritual concepts, there is no definitive proof of anything. I just find it all quite interesting. I’ve entertained the idea of there actually being parallel universes, but I’ve never considered it seriously until now. Any thoughts on the subject?