Debunked
Halley publishes hollow-Earth hypothesis
Edmond Halley proposes concentric spheres to explain geomagnetic data.
Hollow Earth →Every event in our archive, in chronological order. Showing the 1690s — 1 event. Click any event to read the full theory page.
Edmond Halley proposes concentric spheres to explain geomagnetic data.
Hollow Earth →