They exist. They are real. They aren't ours. They aren't an adversary's, because a) the military would never admit it if that were possible and b) if it were the case the adversary would have already taken over the world.
There's no evidence they were made by aliens, leprechauns, or ghosts. But there's evidence they were made. Not that they are swamp gas or funny clouds. So lets get past that, and realize there's something seriously insane going on, and it implies there is, or was, a capacity for non-natural creation + engineering by non-humans.
My 2c is extra-terrestrial civ is less likely than co-terrestrial civ (subterrainean/ocean) - but lets stop talking about this like they are hallucinations or possible atmospheric phenomenon.
There's no evidence they were made by aliens, leprechauns, or ghosts. But there's evidence they were made. Not that they are swamp gas or funny clouds. So lets get past that, and realize there's something seriously insane going on, and it implies there is, or was, a capacity for non-natural creation + engineering by non-humans.
My 2c is extra-terrestrial civ is less likely than co-terrestrial civ (subterrainean/ocean) - but lets stop talking about this like they are hallucinations or possible atmospheric phenomenon.