Did the Big Bang Start From a Single Point?
Cosmologists have long tried to come to grips with the implications of the expanding universe. They follow the arrow of time back to what they assume must be a single point from which everything expanded. They also assume that something happened all thos billions of years ago and everything afterward is a result of that single event. I’m not sure why, in fact, those assumptions don’t seem logical to me. Lately explanations for the Big Bang have pointed at possible interactions between parallel universes. Why would a collision between two universes happen in a single point or at a single moment for that matter?
This might seem idle speculation; of the sort String Theorists are often accused, if it weren’t for recent observations of the cosmic background radiation. Calculating the distribution of energy in the universe based on what we see in the microwave background recent research shows a lopsidedness amounting to 10%. 
In other words one half of the observable universe has 10% more microwave radiation than the other. The the radiation is thought to be from the very first light of the universe red shifted into microwave, it may be an indication of early structure to the universe. In other word it may not have started from a uniform point source. Furthermore some researchers have proposed an explanation of the structure.
Another data point is the recent work done by Quantum Physicists to model the early universe. At very least their calculations hint that the universe has a smallest possible size which corresponds to the maximum allowable energy density. General Relativity will run backwards to predict virtually infinite energy density but not so if you use quantum mechanical measures. What happens when the universe gets so small that it reaches the maximum density—it expands. If it can’t reach a point why would we think it every reaches a maximum? Only if it starts to collapse will it every reach a maximum and currently we think if will expand at ever increasing rates forever.
Let’s suppose that the universe began from some volume that magically appeared from nowhere—or from outside the current universe. What is to say that this appearance happened at a point in time? Why do we assume that this creation from outside isn’t still going on or at least did for some time after the universe came into being? Might the early inflationary period be tied to some type of continuing creation event? I have never heard a good explantation of teh inflationary period let alone any proof that it really happened. As usual I’m left with more questions than I started with.