3 ms·

Given current understanding of physics, which has evolved over time. My favorite idea is that to travel faster than light one could, theoretically, bring the ot

• gorkish 3y ago
  The only problem with the wormhole (Kerr metric) travel thing that scifi seems to ignore is that once you go in, the only theoretical path out is to traverse around the end of time and emerge through a white hole into a completely separate universe. So although you could theoretically enjoin information across vast, perhaps casually disconnected distances in a wormhole, you can't take the result back to your original origin. You became causally disconnected from your original universe as soon as you crossed the event horizon of the wormhole.
  • jakupovic 3y ago
    Could you create another wormhole to come back?
    • gorkish 3y ago
      There’s no “through” a wormhole in the sense that you might immediately assume. The entrances are event horizons just as with a black hole; in fact it may be useful to think of a wormhole as more or less a black hole that appears in more than one place in the universe. To the extent that black holes and wormholes have an “exit” it would always be though another event horizon into another new causally disconnected space. As to if you could come “back” presumably no, or at least we lack the math to describe how going “through the looking glass” so to speak is anything other than a one way trip.