Somewhere in the universe? Yes.
Have they visited? Im certainly not convinced by any of the flimsy modern "evidence", and Id say that the very reason it is likely there is alien life somewhere in the universe is the same reason its unlikely we've ever been visited: The universe is freaking huge.
The odds of aliens being out there go way up given the size of the universe, and the odds of them happening to run into us goes way down... If they could visit and explore a planet every second, it would still be statistically unlikely they would visit our planet. And thats even assuming they can master faster-than-light travel, which as far as we know is also extremely (extremely) unlikely.
Have they visited? Im certainly not convinced by any of the flimsy modern "evidence", and Id say that the very reason it is likely there is alien life somewhere in the universe is the same reason its unlikely we've ever been visited: The universe is freaking huge.
The odds of aliens being out there go way up given the size of the universe, and the odds of them happening to run into us goes way down... If they could visit and explore a planet every second, it would still be statistically unlikely they would visit our planet. And thats even assuming they can master faster-than-light travel, which as far as we know is also extremely (extremely) unlikely.