I just heard of this theory on Coast to Coast and to me this sounds fascinating. To think that earth has a thriving environment deep inside of its own crust is amazing. The theory holds that the iron core of earth is actually a "sun" that helps allow vegetation and other living creatures to thrive. The perspective inside earth is totally different than on earth's surface: continents appear to be floating in the clouds and shadows never move or change shape since everything is static and no rotation. The most outrageous claim is that there are intelligent beings much more advanced than humans living there and are responsible for mankind's progress. Here's a link to the site that was mentioned on the broadcast: http://www.hollowearththeory.com/articles/hollowEarthHistory.asp What are the geologists' thoughts on this topic?