I'm not sure what to think about aliens...
But my stepmother believes they are the fallen angels (who were kicked out of Heaven along with Satan).
Not sure what her beliefs are based on.
I like space/alien movies. Hey, do you think the dinosaurs are extinct or maybe they were rescued by aliens? I like to think they are alive and well somewhere in the universe. I love Jurassic Park (movie) especially the scene where the scientists see the dinosaurs in person for the first time - the amazed looks on their faces are priceless!