I thought maybe it would get into how different hollow Earth theory played into Nazi cosmology. This is the best source I can find, though it does blather a bit

I thought maybe it would get into how different hollow Earth theory played into Nazi cosmology. This is the best source I can find, though it does blather a bit about falsifiability, so feel free to skim. https://aeon.co/essays/how-the-hollow-earth-hypothesis-illuminates-falsifiable-science https://aeon.co/essays/how-the-hollow-earth-hypothesis-illum...