This episode serves as a neat and tidy bookend to the Flat Earth installment...we got them riled up, so we figured we may as well do the same with the Hollow Earthers

Sources:

https://www.encyclopedia.com/philosophy-and-religion/other-religious-beliefs-and-general-terms/miscellaneous-religion/hollow-earth

https://journals.sagepub.com/doi/abs/10.1177/002182869202300304?journalCode=jhaa

https://en.wikipedia.org/wiki/Hollow_Earth

https://www.wired.com/2014/07/fantastically-wrong-hollow-earth/

https://www.uh.edu/engines/epi2180.htm#:~:text=One%20person%20who%20picked%20up,the%20North%20and%20South%20Poles

https://www.gss.ucsb.edu/sites/secure.lsit.ucsb.edu.germ.d7/files/sitefiles/news/conferences/euler/Langton1.pdf

https://www.sciencenewsforstudents.org/article/explainer-earth-layer-layer