> I believe intelligent life may exist elsewhere in the universe, but that we’ve never been visited and will never be visited due to the distances involved.
I suspect that at least one and perhaps many alien intelligences have been here on Earth for a very long time and are observing us, but they're very good at staying hidden so probably we have never observed them and never will.
In the unlikely event that they ever did accidentally reveal themselves, probably they would cover it up to the extent possible while continuing to remain hidden.
Since these aliens will never interact with us in any significant manner, for practical purposes it doesn't matter whether they exist or not, and therefore I don't care very much whether they exist or not. Nevertheless, if, hypothetically, I had to make a bet with equal odds, I'd bet they do exist.
I suspect that at least one and perhaps many alien intelligences have been here on Earth for a very long time and are observing us, but they're very good at staying hidden so probably we have never observed them and never will.
In the unlikely event that they ever did accidentally reveal themselves, probably they would cover it up to the extent possible while continuing to remain hidden.
Since these aliens will never interact with us in any significant manner, for practical purposes it doesn't matter whether they exist or not, and therefore I don't care very much whether they exist or not. Nevertheless, if, hypothetically, I had to make a bet with equal odds, I'd bet they do exist.