The Mundane System Archives - The Libertarian Labyrinth

July 1, 2025

The Hollow Earth theories of John Cleves Symmes

October 20, 2018 Shawn P. Wilbur

John Cleves Symmes’ 1818 declaration that the earth is “hollow, and habitable within” was just the start of a long and fascinating episode in the annals of fringe science. But most accounts of Symmes’ work […]

The Symmesonian Letters and Other Tales of the Hollow Earth

July 6, 2012 Shawn P. Wilbur

This collection of short fiction and satire about “Symmes’ Hole” is intended as a supplement to the archive on the Hollow Earth theories of John Cleves Symmes and includes texts destined for publication in Principles […]