No alien life will be found. Only earth has humans.

@AnnaBunny I don't know, I would say the second is correct (until we are living on multiple planets). The chances of humans independently evolving in an identical fashion on another planet are remarkably small even in an infinite universe. Not impossible, but unlikely. Life similar to humans is much more likely. Unless we are stretching the boundaries of what we consider to be human.

But the second statement is completely irrelevant to the first. There is a lot of life that isn't human.

@ViciDraco Parallelism would produce humanoid worlds and the rare human world.