I wonder if people who seem possessed are actually being invaded by an ET.
Maybe ET's travel with their mind and find host bodies to use as there physical vessels.
Maybe we could do the same thing.
By all means, if you develop a method to allow humans to travel as pure spirit without need for their bodies, feel free to share!
As for possession - as some form of mind control, yes i could probably accept it as vaguely plausible. We can already control each other here, cant
we?
This is actually a more plausible ideal, then say "little gray men from the far reaches of the universe". There are many beings, in many forms. So
anything not of this dimension would be ET. So even extra-spiritual beings being able to posses humans would be quite realistic.