Episode 4a: Hollow Earth Theory

With a brief harken back to the achievement of the Mars Curiosity landing, David and David dive headlong into the mysteries of the Hollow Earth Theory. Stemming from ancient folklore and a few first hand accounts, Hollow Earth Theory is the belief that the earth is hollow and inhabited by an advanced civilization. The boys discuss the mythology and location of entrances in the first part of a mega-episode.

 

Episode 4a: Hollow Earth Theory

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