Posted 23 July 2012 - 08:58 PM
What would happen is that it would be classified, DNA taken, relationship to other animal groups determined and if dead, it would be put on display in a museum.
If the question is: What would it do to religious faith? Probably nothing. In fact the discovery of extra-terrestrial life would likely have little effect on religious faith. If one believes in a transcendent, omnipotent God, then He created all things, whether we have found them yet or not.
Despite that the age of earth exploration is, for all practical purposes over, new animal and plant species are still discovered each year, including some real living fossils like a primitive cave dwelling marine eel and a conifer discovered in S.E. Australia. These things are often hidden away in deep sea, deep jungle or some other place few humans go. It is unlike that we will find a dinosaur alive in Loch Ness, or even the Congo, but plants and animals long thought dead or known only from fossils have a strange way of showing up and confounding scientists. Look up Ginko biloba and the Coelacanth.