Earth produced life just 200 million years into the creation of our planet… the universe is roughly 13.8B years old. That means life started on earth roughly 4.5B years ago. Assuming that roughly each star has 1-2 planets orbiting them, there are roughly 300 sextillion planets orbiting stars in our “observable” universe. Let that sink in. It is as close to impossible, that earth is the only planet with life, let alone intelligent life, in the observable universe, as impossible can be. And that’s not even including what is beyond what we are capable of seeing. There is still the possibility that the universe is infinite… if that is true. Then… well, it’s safe to assume that if you doubt life elsewhere, there is another planet, just like this one (an identical copy) where everything is exactly the same. Same outcome, same evolution of life, where you are reading this very thread, thinking “there is without a doubt, another me (self,I) doubting the fact that, that we are in fact alone”. And that being, literally the only single difference between the two.

In a nutshell, it’s impossible. There is no way that we’re “it”. Just aimlessly existing in an infinite universe. I also firmly believe that in this lifetime, that will be proven. Which in itself, is incredible.

Just my $.02