I believe the Hopi Native American tribe has said that the world has been restarted 5 times i think, so in my eyes what happens is that the world gets to a certain technological point every time and then is inevitably restarted. These unknown objects could be from the past, when societies were as advanced if not more advanced than we are now, or the information on how to make them was found by the people of the older days and were mimicked. The other thing that comes to mind is the access to the akashic record of the collective unconscious. Since cultures of old all seemed to use psychedelics which allow access to the unconscious mind and probably the akashic record, then those cultures could have discovered the technology through ritualistic trance states. If things were restarted 5 times then the information would still be in the collective unconscious simply waiting for rediscovery. Nothing is really new, inventions are imitations of collective thoughts waiting to be accessed and interpretted to the current cultures standards of understanding, or so it seems. Shiva will be back to do the dance of destruction once again and things will restart again. It keeps things interesting. If i had to bet i'd say the breaking point is when machines take over the human mind by human choice. Digital limits it's own progress and when people turn away from spirituality the restart becomes inevitable. Who knows though, but my old past 4 or 5 lives tell me this is so :) When humans rely on digital for too long their minds circle themselves and become restricted in a sphere of understanding to where the only solution becomes creating a new flat perspective to rebuild on, thus flat earth versus sphere earth. The data becomes compressed into a frequency changing from a point sphere to a flat wave frequency only to restart again with the new stored information that is in the new akashic record when things become 3D again...maybe. Oh you provoke such fun thoughts in my mind, thank you.