Or they are so advanced that their “bodies” are made up of individual units teeming with nanotechnology components, most of which are atoms wide, working to gen

Or they are so advanced that their “bodies” are made up of individual units teeming with nanotechnology components, most of which are atoms wide, working to generate power from atoms absorbed from external environment, self repair and more. Units take on different roles. Advanced energy transport system that stores hydrocarbons and carries around highly volatile elements on iron structures in a liquid directly to the site needed for energy. Billions of these nano machine units take on a form to create an ultra low power, powerful neural network capable of self learning as well as passing on learned behaviours. Oh wait that’s humans.