A Maddening theory that can't be disproved
Gerry Foster Hollow Earth Writings
Burlington News: Hollow Earth
Hollow Earth Theory Documentary
Hollow Earth - Another Piece of the Puzzle
Hollow Earth Theories
Euler: Hollow Earth - Fact of Fiction?
The Unmuseum:Hollow Earth
The Lacerta File #1
Our Earth is Hollow
Impact Crater Evidence indicates Hollow Planet
Facts about Impact Crators
UFO Digest: The Hollow Earth Theory
2 Other Layers Reported in Earth's Interior
Vedic Culture Remains in the Hollow Earth
Hollow Earth VS Solid Earth Seismology
Richard Shaver was not the only one to write about underground worlds in the pulps during the 1940s. Every adventure pulp featured many writers using the interior of the earth as the locale for their adventure stories such as the cover story from Amazing Stories in June, 1947 above.
The Facts, Ma 'am, nothing but the facts. . . . Joe Friday
