Say they were beings from Atlantis or Lemuria, or they left Antarctica before it moved far down South and froze and were essentially the same as us. That would be a lot easier to trust. If they were physiologically different in some obvious ways, well then I'd need deeper digging. Maybe they don't eat like us, maybe they injest pills or liquid that are the perfect concentration of amino acids, proteins, vitamins, minerals and fibers in the perfect ratio, or maybe they altered themselves so that they induct energy right into their cells when they stand in an energy field of some kind. It would all depend on getting to k ow them and getting to know about them.