i think the academics who proport to be experts on things of theuniverse-plane-existance should look inward before even beginning to investigate the things that are not of the universe-plane-existance they simply arent equipped to handle such questions until they have atleast experienced astral projection. perception is not fact. but when you percieve things that are clearly foreign to the mind. it simply cannot be a mind-trip. and is therefore more valid than most scientific answers.