I think the main reason cultures before Darwin did not think much about alien life is their model of the universe -- earth was the center and unique. Other heavenly bodies were not worlds. As the model of the universe changed and expanded, so did the imagination regarding life on other worlds. I think . . .
Spiritual/supernatural beings and their existence is one reason why I, personally, cannot discount the possibility of other life out there, too. Other, different life. Just looking at our world, there are microbes and insects and mammals and birds, all physical, and humans who have the divine spark, and angels and demons, creatures of the spirit world. The possibility that God created life somewhere else, out there, is at least a possibility considering what we already know he did here.
But, if I think to ask the question while in heaven and God's answer was, "Nope, Ben, you guys were it," I wouldn't be surprised either . . .
Last edited by BenAvery on March 20th 2013, 3:33 pm; edited 1 time in total (Reason for editing : spelling)