There is a theory among certain individuals that the Earth is not a sphere, but rather a hollow shell with a sun at its center. Proponents of this theory believe that the Earth's crust is only about 800 miles thick, with a large opening at the North Pole that allows access to the inner world.
They claim that this inner world is a paradise, with lush vegetation, clear water, and a warm, temperate climate. It is home to a variety of exotic animals and plants, as well as a highly advanced civilization of beings who have been living there for thousands of years.
According to this theory, the government and mainstream science have been covering up the existence of this inner world for decades, fearing the implications it would have on our understanding of the universe and our place in it. They believe that the evidence for the hollow Earth can be found in ancient texts and legends from all over the world, as well as in the strange phenomena that occur near the poles, such as compass deviations and unexplained lights.
Thoughts on Hollow Earth Theory?
I think this is the sort of theory that I'd be extremely tempted to believe in, if it were true.