Just as plausible as an extra-terrestrial origin I suppose, as FTL travel is just as miraculous tech-wise, as time travel. Of course, we're talking pure speculation. We know that something with advanced capabilities is buzzing around, we just don't know the origin.
From all I've read, seen, etc. it appears the government's position is that they are of an extra-terrestrial origin, and since they likely know far more than I on the subject's realities, gonna have to go with them.










