Like a mutant or early version of the Star Trek Borg, this Thing is not only in a constant flux, its nature is change, this is what the Thing is, it is the essence of changing adaptation and evolution, what you see is certainly NOT, what you get. Like the Borg, the Thing assimilates life forms it encounters creating conglomerate bodies that take the shape of that which was last assimilated, whereas the Borg transforms the living beings into Borg clones and assimilates thoughts and ideas, the Thing takes the outward appearance and nothing of the essence or thoughts of that which it assimilates.