 The Doctor wrote:
As a mathematical construct I can understand that, sort of. As I said, my level at this is definitely at the novice level. But, for antimatter to be moving backwards in time, it would have had to move from one of two points, either backward from the point of the big bang, which would have resulted in an alternate universe "before" the big bang and would render the anti-gravity theory null as antimatter would be residing in a separate universe altogether. Or it would have had to move back in time from a point in time after the big bang (possibly the end of the universe), which would have required at least two points of time to have come into existence simultaneously. I'm not saying this isn't possible, but it would certainly require an additional assumption and sort of defeat the Occam's Razor statement earlier on in this thread. |
Not necessarily. If time would be considered as a closed loop, so that the "far future in our positive direction" and the "far past in the negative direction" meet together, then it is possible to think that the antimatter universe evolved normally "backwards in time" from the bang and that in it's far "future" (going "left" away before the bang in our coordinate) and that it eventually reaches our far future and re-enters our matter universe from the future and moving towards our past. Our matter universe obviously would do the same in an opposite way, in our far future it would meet the "antiuniverse" and enter the antiuniverse "moving backwards in time" from that antiuniverse point of view (towards the bang again).
The "futures" of both the matter and antimatter universes would merge and gradually anihilate eachother as they make contact with eachother. First as extremely diluted universes the anihilation would be rare, but as they get deeper within eachother towards the direction of the mutual bang the stuff density would be higher and anihilation would get faster and faster, until everything is anihilated and converted to pure energy, ready to bang again.
Again it's obviously just mathematical speculation but it's not as weird as it may sound. 3-dimensional space is thought by many to be such a closed (expanding) loop, so that if you could travel faster than light to its "edge" you would just get round and get back to your starting point.
Time is thought to be just a 4th dimension so there's no fundamental reason why the same "closed loop" argument might not be applicable to time.
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