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Originally Posted by CDavidNeely
Greetings and Felicitations,
Where did you get this wonderful idea? You can't travel back in time to change things. If you travelled back in time to change an event then it wouldn't have happened in your future. If it hadn't happened then you would not need to go back to change it. And so forth. And so forth.
The future doesn't exist in the time stream other than a cloud of chaotic possibility.
As far as warp drive is concerned. I will refer you to: Alcubierre warp drive.
Sincerely Yours,
C. David Neely |
I considered the possibility that traveling back in time to change past events is impossible. . .
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Originally Posted by solletica
or that alterations to the timeline are fundamentally impossible.
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But it's only a possibility. If there's no forking of parallel time lines, then if events are altered in the past, the current world could change, but none of us would be aware of it. The past could be being altered right now and none of us would know it. Alterations that could affect the time line in a way that creates inconsistencies (i. e. going back in time and stopping your birth) may either be prohibited or allowed w/the appropriate changes (i. e. w/you being removed from the universe) or allowed w/parallel universes being forked. To be honest, I don't know.
However, the Alcubierre Drive (assuming one could be built) allows a ship to travel back in time (even though it prevents time dilation effects), because anything traveling faster than light in one reference frame implies reverse time travel in others (according to GR).
With an Alcubierre metric in place, probably wouldn't be hard to setup a scheme to travel back in time on Earth.
Also, if the future is merely a cloud chaotic possibility, then the
whole universe (in all times) should be a cloud of chaotic possibility, since every point in time in the universe was at one time the future.