Tim Swartz | The Inner Earth, Antarctica, & Conspiracy Goodness
You might like this Thunderbolts.info episode - What's Inside Jupiter?
Get to around 7 mins and it describes the science behind how Jupiter & The Earth (and other planets with a magnetic fields) are hollow.
Perhaps another EU episode is needed to explore the questions around : if we accept EU theory does that means we have to accept hollow earth?
The part where he talks about the Inuit people say the come from a land in the north that was warm and had vegetation and a polar sun - I take this as a description of the Saturn Theory of the golden age and polar sun.
EU theory also explains some of the Aurora Borealis phenomenon.