I think globe earth exists as a containment unit. Everyone stopped exploring because we are told and shown images of frozen tundra. The people in control dont want you to know there might be more land, resources and it will also open up a world of new questions about our origins and ancient history.

Nikola Tesla said about the theory of Relativity,

"Magnificent mathematical garb which fascinates, dazzles & makes people blind towards the underlying errors. The theory is like a beggar clothed in purple whom ignorant people take for a king."