Quote:
Originally Posted by Steven Lyle Jordan
I think the power requirement is the simple and elegant feedback mechanism preventing us from journeying back into time.
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Maybe, but that is not what Kip Thorne and Stephen Hawking were talking about in their popular books that dealt with the subject. For one thing, we know that FTL happens in the real universe (or are at least reasonably sure) via the expansion of the Universe. However there are no causality problems because the regions are causally and observationally isolated from each other... being that they are at the far ends of the observable Universe (and not in either regions observable universe).
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Bill