Hollow Earth – Part One Episode Description:

In Part 1 of this two-part deep dive, This Podcast is a Secret explores the wild world of Hollow Earth theory. Is the Earth solid, or is there something more mysterious lurking below us? We’ll trace the origins of this bizarre idea, starting with ancient mythology and religious texts before moving into the "scientific" theories of early thinkers like Edmond Halley and John Cleves Symmes Jr. You’ll also hear about the strange, larger-than-life characters who dedicated their lives to proving the Earth is hollow — some of them with some pretty laughable results. This episode sets the stage for even wilder claims in Part 2.

Episode Highlights: Origins of the Hollow Earth Theory — From ancient myths like the Greek underworld to Tibetan tales of Agartha. Edmond Halley’s Scientific Proposal — How a respected astronomer’s theory of concentric inner spheres kicked off centuries of speculation. John Cleves Symmes Jr. — The man who popularized the idea of "Symmes Holes" at the poles and tried to launch an expedition to find them. Funny Characters and Wild Stories — Meet the true believers and wild eccentrics who dedicated their lives to proving Hollow Earth is real. Government Secrets? — We introduce the idea of government cover-ups and why some believe there’s more to Antarctica than just penguins.

Stay Tuned for Part 2! In Part 2, we’ll take things up a notch. Giants, dinosaurs, and underground civilizations are all on the table, and we’ll explore modern claims, bizarre expeditions, and the wildest theories Hollow Earth has to offer.