The firmament and Hyperborea.
The first two motives in Firinn's list need closer attention in this thread.
The other 5 items are more or less what we all think of the sad state of reality in this vaccinated world in a vacuum called space.
Before ~ 1850 we know nothing. Possibly up to as late as the early 1900s?
The simulation theory explains that whole Mandela Matrix mess.
And the Black Sun projection theory explains our universe.
And the Control System hides the dome and both poles.
We have no way to travel to Hyperborea and Antarctica, eapecially when Google maps is so compromised.
It seems, in my childhood memories, that explorers used to dog sled to the North Pole. But now it's all ocean.
The dome is of course unobtainable. The best proof of it may be the light rockets that fly to about 70 miles, but no further, though momentum should allow them to go higher.
View: https://youtu.be/lSx8QVr2ZdM?si=nd5OVk-1u9i0o74s best proof of the dome available to the public is probably this whistleblower testimony: