In the final chapter of the Hollow Earth saga, Conspiracy Corner goes fully off the rails—into myths, failed expeditions, parody novels, and the strange evolution of ideas that start as science and slowly drift into conspiracy territory. What begins as a continuation of earlier theories quickly turns into a chaotic exploration of how humans try (and often fail) to explain the unknown.

The episode opens with the hosts immediately diving back into the Hollow Earth discussion, but this time the tone shifts toward how these ideas spread in early American frontier culture. Figures like John Cleves Symes Jr. emerge as early proponents of Hollow Earth theory, not as modern “conspiracy theorists,” but as individuals genuinely trying to model unexplained natural phenomena using the limited scientific understanding of their time. The conversation hig ...