Arthur
Honorary Master
Intelligent life elsewhere is not the slightest problem for Christians.Actually, for Christians it is a real problem. Go and read Psalm 8. Basically God created man a little lower than the Angels and put him in Dominion over all creation. But if Aliens (at least aliens that are more advanced than humans) are real, then it means that is not true, and the Bible must therefore be a lie.
(a) The existence of non-material intelligent life is an article of faith. The good ones are called angels. The bad ones are called demons. Christians, Jews and Muslims believe these beings have on rare occasions interacted with humans.
(b) Intelligent beings with bodies would be called humans, no matter what they look like or how advanced/retarded they are. In the classical and historical Christian understanding, a human being is simply that type of creature that is a matter-spirit composite. For them to be intelligent they would necessarily have to have a spiritual soul, because the rational part of man (the soul) is non-material in this definintion. It matters not a jot what continent or planet these beings come from - as long as they are intelligent animals they are human.