[Average Joe]

Onto Hollow Earth Theory, would anybody out there like to give me an explanation of how a planet could actually form.....hollow! Every common sense thing I know tells me that it would not be possible for a forming spinning new planet to form hollow. It would just fill itself in as it span and cooled.

I'm not discounting the theory that the core may not be iron, as in popular theory, but the way I see it, the sphere that we stand on has to be solid. Whatever is in the core, I'd stick my neck out and say its not empty space.