User blog comment:SouthWriter/Time Travel and/@comment-or Alternate Universes/@comment-1777104-20100813131730

It figures, time dilation is crucial to Russell Humphreys' theory of how God created the universe - that is, time 'here,' near the center, being slowed to nearly nothing as God spread the matter from the center - the 'deep' of Genesis 1:2. Humphreys, though, admits that his theory is open to change as we learn more about the universe.

I take it that FTL means "Future Time Travel." That is theoretically possible if you can somehow go faster than light. Time dilation is time slowing either under gravity OR at great speeds (special relativity linking the two). If you go faster than light, you get somewhere before a signal would have reached your destination in normal space. Conversely, no matter how soon you got there, it would be years before anyone knew anyway. For you, based on time dilation, no time at all would have passed. A sad state of things indeed.

If, however, you went very fast within the weak gravitational well of the earth (I don't think it matters which direction) you would get to the future in what seemed like "no time" to you. But you could never go back. It's a one way street. We all 'time travel" in our 'four dimensional' world, but it is in 'real time.'