General Relativity determines the cosmic speed limit by the bent or "warped"
geometry of the universe which can be further stretched in theory by a
Black-White hole held open by a large Casimir Effect Capacitor called a Worm
Hole. In this case FTL travel is allowed and therefore reverse time travel is
allowed as well and therefore "snatching people from the past", etc. becomes
possible. Kip Thorne and friends who pioneered this Worm Hole aspect of
theoretical physics at CalTech have solved the twin paradox for inanimate
systems (without free will) but the twin paradox is still not completely worked
out for reverse time travel anyway. Regardless, to do this engineering of
stellar mass to generate incipient Black Holes and then the huge Casimir Effect
Capacitors would need to be figured out which is beyond the realm of present
day technology by many orders of magnitude. And yes I agree with you (and
Stephen Hawking) that the apparent absence of time travel tourists flocking to
watch history literally in the making is good support or negative evidence that
Worm Holes may not be possible. Period. Although an "arbitrarily advanced
civilization" as Kip puts it may have a Prime Directive kind of law or culture
in place so that any visitors are covert spies but that sounds too much like
the X Files for me to be comfortable with it. The paranoid sound of "Visitors
in our midst" kind of thing is sort of eerie. -Bill.
Prof. Gomes wrote:
> Thanks for using NetForward!
> http://www.netforward.com
> v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v
>
> It is not necessary reverse time-travel but just reverse time-access, in
> such a way we could recuperate the individual to the present (future.....).
>
> Gomes.
>
> At 23:16 12/12/97 -0800, you wrote:
> >
> >This is a side issue from the FTL "teleportation" story, but does anybody
> >know if travelling backwards in time is theoretically excluded by General
> >Relativity or any other physical theory.
> >If reverse time-travel is possible, then I guess (should we fail to
> >achieve biological immortality in our lifetimes) we have a chance of being
> >"rescued" by future humans once time travel is invented. In this way,
> >anybody who has ever lived is potentially immortal if they can be snatched
> >from the past. I think there are some obvious flaws to this argument,
> >though. For example I don't see any time-travellers around right now.
> >But there is the parallel universe thing etc.
> >
> >TBC
> >
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General Relativity determines the cosmic speed limit by the bent or "warped" geometry of the universe which can be further stretched in theory by a Black-White hole held open by a large Casimir Effect Capacitor called a Worm Hole. In this case FTL travel is allowed and therefore reverse time travel is allowed as well and therefore "snatching people from the past", etc. becomes possible. Kip Thorne and friends who pioneered this Worm Hole aspect of theoretical physics at CalTech have solved the twin paradox for inanimate systems (without free will) but the twin paradox is still not completely worked out for reverse time travel anyway. Regardless, to do this engineering of stellar mass to generate incipient Black Holes and then the huge Casimir Effect Capacitors would need to be figured out which is beyond the realm of present day technology by many orders of magnitude. And yes I agree with you (and Stephen Hawking) that the apparent absence of time travel tourists flocking to watch history literally in the making is good support or negative evidence that Worm Holes may not be possible. Period. Although an "arbitrarily advanced civilization" as Kip puts it may have a Prime Directive kind of law or culture in place so that any visitors are covert spies but that sounds too much like the X Files for me to be comfortable with it. The paranoid sound of "Visitors in our midst" kind of thing is sort of eerie. -Bill.
Prof. Gomes wrote:
Thanks for using NetForward!--------------FA87C0A20D50F59427FA6332--
http://www.netforward.com
v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^vIt is not necessary reverse time-travel but just reverse time-access, in
such a way we could recuperate the individual to the present (future.....).Gomes.
At 23:16 12/12/97 -0800, you wrote:
>
>This is a side issue from the FTL "teleportation" story, but does anybody
>know if travelling backwards in time is theoretically excluded by General
>Relativity or any other physical theory.
>If reverse time-travel is possible, then I guess (should we fail to
>achieve biological immortality in our lifetimes) we have a chance of being
>"rescued" by future humans once time travel is invented. In this way,
>anybody who has ever lived is potentially immortal if they can be snatched
>from the past. I think there are some obvious flaws to this argument,
>though. For example I don't see any time-travellers around right now.
>But there is the parallel universe thing etc.
>
>TBC
>