Originally posted by Smoking mirror
When it comes to theories of the nature of the universe I have my own ideas. The fact is no one actualy knows the true nature of the universe, so the best you can do is follow the popular scientific trends. I try to synthesise my own ideas from current discoveries.
Generaly I belive in a universe of finite physical size, expanding out from the big bang. I belive that either the universal constant is not high enough to enable the continuous expansion of the physical universe against the pull of gravity, or we live within a bubble universe, that is within a second universe and so on. The overall trend being a meta-universe that expands out ward from the moment of the big bang (or perhaps a meta-big bang) untill the weight of gravity eventualy causes it to collapse. As the universe begins to shrink, and expansion becomes contraction, time runs backward. Eventualy after you have lived your life in reverse with cause and effect reversed (technicaly it would be impossible to tell if time were running forward or backward. Time could be running in reverse right now and you wouldn't even know it) and the universe has contracted down to the big crunch (a big bang in reverse, not a implosion, but a backwards running explosion).
For a moment time and space do not exist and this is the moment that all other realities start from. Slight quantum fluctuations in the nature of the quantum vacum cause an infinate number of big bangs, each creating a whole universe with its own physical laws, and characteristics. A universe may be "clumpy" like our own, with matter and energy, and planets and life forms, or it may be "smooth" with galaxies of emptyness. These caracteristics are caused by the state of the quantum fluctuations in the vacum during th first moments of the big bang.
This is not a cycle as such, the alternate universes do not exist one after the other, as they are created outside of the normal flow of time, which itself is probably just an illusionary side effect of the expansion and contraction of the finite bubble universes. Each universe, the full infinity of them, exists at the "same time", and certain effects such as gravity may spread between them. However, they are not temporalry attached, unless there is a simpathetic temporal echo alighning them by size (so that if you could cross into another parralel universe it would be the same size as ours, so technicaly the same date, unless the physical laws were different).
The most important point of this idea is that our own reality is not unique, not only are there an infinite number of realities where we dont exist, there are also another infitite number of them where we do, and even an infintie number where we exist and make exactly the same decisions as we have in this reality. All those other you's, are all you. However you do not have a direct consious link with them, becasue you are physicaly seperated from them. Imagine if your brain were cut in half, but some how kept alive. To some extent you would form two consiousness's, each aware of itself, but not the other. (don't try it at home!)