It is thought that the big bang was the beginning of space, matter and time, and that all space and matter were created from absolutely nothing. How can we conceive of something from absolutely nothing? New understanding suggests that this might not be the case, and there could have been something before the big bang. Could time have been created with the big bang, as our current theory suggests, or has time always existed? Some scientists now believe there could be more to the big bang theory and think it is possibly only part of a very complex story.