Time is not a variable in a fourth dimension that can be pushed forward or backward. The only way we might change time is for a future time when we can plan and create the future so accurately we actually are able to create every aspect of it. This would take considerably more understanding of physics than we currently have.<br /><br />Time is virtual in terms of past or future: we recreate the past in our minds and thoughts through the non-forgotten experiences and records of it, and we are able to create mentally the future and plan for it. Time does not pass as Newton thought. Time is a process that is more complex, and depends on the mind’s ability to formalize virtual time in the experience of motion of all things--time is the process of motion.<br /><br />To have light going around in circles is motion, a time process. It has nothing to do with creating future or past in the literal sense.<br /><br />Sci-fi depends on such silly notions, and at times they can be rather entertaining, but that is all they are, unless someone can get some kind of insight about reality from this kind of free thinking.<br /><br />And for those in the business of relativity science in regards the time dilation issues, I do not buy any of it yet. It’s so elementary, because if two references are traveling with respect to each other, then they both appear to dilate with respect to each other. So this non-logic should tell you something, unless someone can actually show me differently.<br />