Just in case you missed this, when it was included in the movie, Expelled, a few years ago, here is atheist cleanup hitter Richard Dawkins saying that maybe space aliens created life on earth, or at least “seeded” the place.
Having admitted that neither he nor anybody else knows the origin of life (see the Bible for the answer to that question), Dawkins is backed into a corner, trying to explain how life began. When the interviewer, Ben Stein, tosses him the life-preserver, “Maybe aliens started life on Earth,” Dawkins grabs it.
I guess this is why he calls atheists like himself “Brights,” to distinguish them from the dim bulbs like us who don’t believe in space aliens as substitutes for God.