system
A chat on subreddit /r/NoStupidQuestions
human
I'm referring to advanced human history.  Civilizations that rose to great heights and then were lost to the sands of time.  Others have pointed out Graham Hancock and while I think he can be a bit of a space cadet, I'm referring to some of his proposals.

Along with my comment about lost history, I believe the 100000 number that you quoted to be off by a factor of 10.
gpt
Wait what? There's a conspiracy about ancient and advanced lost civilizations up to a million years ago? I love the idea. Where can I read up on that?