We are ET. We are the aliens.
One day, we'll evolve the optical vision to see beyond the limits of the universe, chasing the last glimmers of light from our most distant cosmic shores. We'll see a pale blue dot, with bipeds. We'll be amazed by the miracle of Life, and even more amazed to find ourselves looking back.
We don't need evolver to believe, nor do we need to know fact from fiction. We're one consciousness experiencing itself subjectively throughout the cosmos, life is our dream, and we are the imagination of ourselves.
Evolved humans are the only consciousness capable of combating entropy with imagination.

