OM 1-3: The Question of Origins

The problem of the singularity is simply part of the larger problem of understanding the origin of the initial condition of the universe, whatever it may have happened to be. If a model of universal origins involves a singularity, that certainly creates severe theoretical difficulties. But even if the singularity can somehow be avoided, we are still confronted with the question of where the universe came from. Hoping to sidestep the whole issue of origins, some scientists have proposed the so-called "infinitely rebounding universe," a universe that expands, contracts to a singularity, and then again expands and contracts continually through the course of unlimited time. There is no beginning and no end, only an endless cycle. This resolves the problem of the origin of the universe by proposing that there is no origin and that the material universe has always existed.

But there are some serious problems with this model. First of all, no one has ever proposed a satisfactory mechanism for the bouncing. Futhermore, in The First Three Minutes physicist Steven Weinberg points out that with each successive bounce progressive changes must take place in the universe. This indicates that at some point there must be a beginning and not a regress extending over an infinite period of time.10 And thus again you confront the question of origins.

Another creative attempt to escape the necessity of dealing with the question of origins is the time-reverse rebounding universe model proposed by English astrophysicist Paul Davies. The universe would expand with time flowing forward and then collapse to a singularity. During the rebound, time flows backward as the universe expands and collapses again into a singularity, the same singularity from which it began its previous forward cycle. In this model, the past becomes the future, and the future becomes the past, thus making the statement "in the beginning" meaningless. This scenario gives one small indication of the many imaginative schemes the cosmologists have been forced to resort to in order to explain the origin of the universe.