Time Travel

[kandrathe]

Actually, I think the answer would be in experimentation. I think as Pete had alluded, a device is neccesary. Once you have figured out a workable hypothesis on how to manufacture and move something like a probe through the "wormhole" if that is your theory, then you need to prove that it worked by either retrieving the probe, or by some other observable method. For experimentation with time, seconds or minutes are sufficient. If you send an object back in time, you would already be past it in the time continuum and so unable to observe it. You might theorize that it exists in the past in an alternate universe, but as you imply it is unobservable. If you were able to send an object forward in time you might observe the item winking out, and then winking into existence moments later, that is of course if you are able to send it into the future of your own universe.

IMO, the secrets of the nature of time travel are embedded in a detailed understanding and ability to control gravity.

Here is an opinion from a September 2002 Article from Scientific American.-