The Day The Earth Stood Still, great film, way ahead of its time.  I watched a video on youtube I never realized how long Mr. Aykroyd has been researching and following UFOs,( ufology ) and other life forces in our universe. He has had the fascination, and intrigue since he was a kid.  We had the Roswell incident, there is a list of sightings that goes way back in centuries.  I believe, one obvious reason, our immense universe.