Maybe there has been some sort of accident of scale, like the intergalactic fleet in Hitch Hiker Guide to the Galaxy that arrives to destroy Earth but is eaten by a dog.
There could be a banging ET party going at the Planck scale and we would never know, they might as well be on the other side of the universe.
There could be a banging ET party going at the Planck scale and we would never know, they might as well be on the other side of the universe.