| Sqrl said:
@Retrasado, Your view assumes they know nothing that we do not. I agree completely with you that under our current knowledge and technological limits it is fairly unfeasible to make such trips, but we can't assume that about a possible alien civilization for the reasons I specified above. In addition I will add that it is widely believed amongst physicist that folding space for the purpose of travel is technically possible under our current understanding. To be clear their position is essentially that it breaks no rules they can see and so should be possible, whether or not its a viable option in terms of energy cost, and whether or not it is safe are questions far beyond our current understanding but the fact that the door is open means it is possible for another civilization to have done it.
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I'm not saying that that's they only way to travel interstellar distances, but any other way to travel it (like folding space) would require a LOT more energy than the amount I stated above. Also, assuming they could do this, they would obviously be a fair amount ahead of us technologically; which brings two other questions: The main one being, why would they want to visit us? If life is at least fairly common in the universe, I can't imagine our civilization having anything of note that would interest another civilization enough to visit us on a regular basis, though with no info on this topic, (ie. no other civilization to compare to) we obviously can't be sure on this. (One our inventions that another civilization may not have thought of would be multi-core computer processing) However, if they did have the technology to visit us frequently, they would most likely also have the technology to make it so we can't detect them easily (if at all).
Not trying to be a fanboy. Of course, it's hard when you own the best console eve... dang it
