The oddly persistent theory that our planet is hollow at its center dates back to the celebrated seventeenth-century British astronomer Edmund Halley, who accounted for variations in the earth's magnetic fields by proposing that there were, in fact, several centers of gravity within the globe. Halley believed that the Earth was comprised of four concentric spheres; he further suggested that the center was populated with unknown life forms. Halley's idea would later be taken up and enhanced by American John Symmes, who first theorized that North and South poles housed entrances to the Earth's core, as an explanation for the magnetic irregularities experienced by early polar explorers. Although this concept obviously lost some credibility after Admiral Byrd's expedition, it even today boasts tenacious adherents, some of whose imaginative extrapolations and beliefs go beyond the scope of science into far-flung esoteric realms.
Some believe, NASA notwithstanding, that the Earth's current population is in fact mistakenly inside the planet; others point to a mysterious 'lost diary' of Admiral Byrd detailing his strange experiences past the pole, or assert that extraterrestrial life comes from within our planet rather than from other galaxies.
These 'classic' hollow earth theories colluded with the early rise of the Science Fiction genre in grim Lovecraftian fashion, with the advent of the 'Shaver Mystery' series. In the mid-1940s, Ray Palmer, editor of the seminal 'Amazing Stories' pulp magazine, converted the paranoid testimony of Pennsylvania welder Richard Shaver into 'I remember Lemuria!' Shaver's story intertwined his experiences inside the Earth with the search for the 'lost continents' of Atlantis and Lemuria, whose scholary pursuit was popularized by American Ignatius Donnelly in the late nineteenth century. Speaking from first-hand inner-earth experience, Shaver recounted how the ancient Lemurians/Atlantans had been obliged to leave the Earth's surface because of dangerous solar radiation. These beings took off for outer space, leaving their cities to be looked after by robots. Later, when an earthquake-type cataclysm forced the cities into the center of the Earth, the robot society became polarized, resulting in an eons-long war between good and evil.
'Crackpot' theory or secret ancient wisdom? The mystery of the lost center still holds a strong allure, despite the passage of time and scientific scorn. Who knows what could be transpiring just beneath the surface?