I'm not sure exactly what discipline this falls under, so general it is. If there is a better place to put this, please let me know. Anyway, A colleague and I were having a philisophical discussion about the nature of the expansion of the universe from the point of view of big bang theory. I have come to understand that the singularity was contained within space time and that only energy and matter expands from that point. He believes that space time was contained within the singularity and, upon "bang," it propagated and some speed greater than the speed of light and that all matter and energy expands within it. We are very curious as to which way is the correct way to interpret the threory, but none of out professors are comfortable answering that question confidently. For the purpose of explanation, we are both about to obtain our undergraduate degrees. Thanks for your help in advance!