Category:Hollow Earth theory

  1. Earth mysteries
  2. Geodesy
  3. Pseudoscience
  4. Obsolete scientific theories
The main article for this category is Hollow Earth.
fr:Catégorie:Théorie de la Terre creuse

ko:분류:지구공동설 ja:Category:地球空洞説 zh:Category:地球空洞说

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