A sci-fi trope, some people actually believed that there is substantial space inside the earth’s sphere where curious things occur. The history of the hollow earth idea is complex and far more serious than you might guess. It definitely qualifies as some spooky alternative to geology.
Tag: hollow Earth
Dr. Tom Holtz’ talk on paranormal concepts in geology
Dr. Thomas Holtz of the Univ. of Maryland presents at Balticon 50 on May 30, 2016 his talk about paranormal concepts on the nature of our planet.