https://www.youtube.com/watch?v=RmylzTDCpss
However, if this world is part of a cosmic simulation, then various beings and technologies could appear or intersect with various points in time of earth history.
We’re Probably Not the First Civilization… Here’s Why https://www.youtube.com/watch?v=zbHDHhkoLKk
The Earth is estimated to be around 4 & half billion years old. That's a lot of time for various civilizations to have potentially made the climb from the stone age to the space age more than once.
