If that were true, then wouldn't a calculation be able to accurately predict the next collision/big bang and render the doomsday point moot? Although, I have no letters beside my name, I was under the impression that Brane theory (for simplicity sake) is an explanation of the origin of the big bang and the notion that bangs are happening all over the place at all points in time. I am curious, what is the thread that ties String Theory, Brane Theory and M-Theory together? (pardon the pun) I have found my Nirvana in these forums and cannot read enough. If I cannot be a fly on the wall at the Perimeter Institute, than I shall be one here!