Just by the laws of probability, other forms of life should exist on another planet. There are an infinite number of planets, stars and galaxies. If you believe in evolution, then you should be a firm believer of extraterrestial life forms. If they don’t exist, that is a good confirmation or indicator of a higher power. If they do, than the argument is again, who created these beings, was it evolution or a higher power? The non-existence of ET only tends to lean towards that there is probably a GOD. But if they do exist and If they look exactly like us, then they are probably body snatchers and you should run like hell.