Hellhole, and welcome to The Dirt! Spooktober continues with an exploration of portals to the underworld. We're bringing you some unexpected sounds from Siberia, a couple of incredible caves, and the science behind sacrificial bulls dropping dead in ancient Rome. Plus, the Medieval European origin of the Hellmouth! Get your spelunking gear and maybe a comforting blanket or two as we journey to the underworld together.

To learn more and dig deeper:

https://scratchpad.fandom.com/wiki/Coast_to_Coast_AM_-_Index_of_Guest_Appearances

https://www.bbc.com/future/article/20190503-the-deepest-hole-we-have-ever-dug#:~:text=Drilling%20was%20stopped%20in%201992,whole%20facility%20was%20closed%20down.

https://www.wired.com/2014/01/an-artist-records-the-mysterious-rumblings-of-middle-earth/

https://mymodernmet.com/krubera-cave/

https://www.nationalgeographic.com/science/article/deepest-cave?loggedin=true&rnd=1697313803769

https://www.theatlantic.com/science/archive/2019/02/getting-lost-cave-labyrinth-brain/582865/

https://www.thedailybeast.com/welcome-to-hell-a-history-of-portals-to-the-underworld

https://www.smithsonianmag.com/smart-news/people-lived-cave-78000-years-180969051/

https://www.nature.com/articles/s41467-018-04057-3

https://www.sciencealert.com/scientists-find-the-oldest-evidence-of-indoor-human-activity-deep-inside-a-desert-cave

https://www.science.org/doi/10.1126/sciadv.aba1219

https://www.vice.com/en/article/epvbxk/archaeologists-found-an-ancient-entrance-to-the-underworld-under-a-church-in-mexico

https://www.livescience.com/archaeology/maya-canoe-surrounded-by-animal-and-human-bones-found-in-portal-to-the-underworld-in-mexico

https://www.forbes.com/sites/carlymiller/2019/08/09/skulls-analyzed-from-the-mayan-sacred-cenote-show-that-human-sacrifices-were-sourced-from-far-and-wide-across-mexico-in-1000-ad/?sh=12d34a7ae8b7

https://www.livescience.com/61871-maya-underworld-found-longest-submerged-cave.html

https://www.science.org/content/article/roman-gate-hell-killed-its-victims-cloud-deadly-carbon-dioxide

https://www.jstor.org/stable/3046829?typeAccessWorkflow=login&seq=8

https://collections.vam.ac.uk/item/O90891/the-last-judgement-panel-unknown/

https://www.bl.uk/manuscripts/FullDisplay.aspx?ref=cotton_ms_tiberius_c_vi