Eli5: How do we know that the Hollow earth theory is false if we have never been in the center of the planet?

Question

Eli5: How do we know that the Hollow earth theory is false if we have never been in the center of the planet?

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Answer 1

Lots of observational evidence:

* We have ground penetrating radar that can show what different parts of the earth interior looks like

* We have a magnetic field, which could only exist if there was a metallic core in the center of the planet

* Subduction and movement of tectonic plates only works if there are thermal convection currents from a molten core and hot mantle

* A hollow earth would lack the mass to have the gravitational field we all live in every day

Compare that to the complete lack of evidence the earth is hollow and it’s a pretty compelling story. It’s a falsehood that “If I can’t see it, I don’t know if exists”