Haven't you ever wondered if all the stories in the bible, all of the sightings of God were just ways people back then coped with aliens?
Leaving, but promising to return one day
I'm sure you guys have heard of the isolated islands in the pacific that the U.S. took over to build air bases on.... The people there were so isolated that when they saw air crafts they were fascinated. They were even more excited when the men inside the "flying birds" brought them corned beef and other food and cargo. However, after WWII the U.S. abandoned those air bases and just left the islanders abruptly. The island priests claimed that the men inside the airplanes were their ancient ancestors come to provide for them. They built wooden idols that looked like the planes in hope to summon back the planes, and the food that came with it. They based a whole religion off of it.
So you can see where man could come to conclusions about a higher power in order to explain things that are out of the ordinary.
All of the pictures on cave walls and statutes that look remarkably like astronauts, or aliens. Petroglyphs of exact same things on the other side of the world.
I don't know. Just something to think about. Watch some History Channel :)