Multiverse

*Multiverse: Brian Greene's topic on Nova last evening got me to thinking. Will the separate time track that is created by the split in the past caused by backward time travel actually be a different multiverse instead? If each one is supposedly 'curled up', will a new one uncurl from this planned intervention/tinkering with the past? The show suggested that a vast number of these multiverses exist, perhaps peopled with exact replicas of you and I, but maybe a different outcome is in the range of possibilities? Opens an amazing set of opportunities for a writer. . .