So wait, what? The Earth … hollow? Yes, it’s an insane theory, and yes it is as fictitious as the fairy tales that gave rise to it, yet at the same time it can’t be directly disproved. Why? Because we have never actually dug more than about 15 miles below the surface of the Earth, so there is no 100% direct evidence the Earth is solid through an through! Does this mean Hollow Earth Theories could hold true? Sure, and Santa might actually drop by 6 billion houses a year on a sled pulled by a glorified pack of deer.