Fact check
Is it true: Hollow Earth?
No — this has been debunked.
Seismology has mapped Earth's interior extensively since the early 20th century. P-waves and S-waves from natural earthquakes propagate through Earth consistent with a solid inner core (~1,220 km radius), liquid outer core (~3,400 km radius), solid mantle (~2,900 km thick), and crust. A hollow interior would produce completely different seismic signatures. The Preliminary Reference Earth Model (PREM) and subsequent tomographic images confirm the standard structure. Gravity measurements, moment-of-inertia calculations, and deep mantle drilling all converge on the same answer.
The claim
The claim that Earth is hollow, with inner surfaces, inhabitants, or openings at the poles. Versions include the 17th-century scientific proposal by Edmond Halley, 19th-century Symmes Hole theory, and
Key evidence
Edmond Halley proposed a hollow Earth model
Seismic waves map solid Earth interior
Conspirafy steelmans each claim, then follows the evidence. How we reach a verdict · Check another claim