This week I look into the theory of Hollow Earth. Who originally discussed the theory and how it evolved over time.Get In TouchInstagram: https://www.instagram.com/cultvaultpod/Twitter: https://twitter.com/CultVaultPodTumblr: https://www.tumblr.com/blog/cultvaultReddit: https://www.reddit.com/user/Cult-VaultGmail: cultvaultpodcast@gmail.comPatreon: https://www.patreon.com/thecultvaultSourceshttps://journals.sagepub.com/doi/abs/10.1177/002182869202300304?journalCode=jhaahttps://www.britannica.com/biography/Edmond-Halley/Halleys-significancehttps://halleyslog.wordpress.com/about/https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/TE018i003p00113https://www.famousscientists.org/edmund-halley/https://halleyslog.wordpress.com/2012/10/22/halleys-instructions-3/https://www.vice.com/en_uk/article/ywgexk/a-journey-to-the-centre-of-modern-hollow-earth-theoryhttp://www.bbc.co.uk/earth/story/20150814-what-is-at-the-centre-of-earthSupport this podcast at — https://redcircle.com/cultvaultpodcast/exclusive-contentAdvertising Inquiries: https://redcircle.com/brandsPrivacy & Opt-Out: https://redcircle.com/privacy