Even though humans have known that the earth is a sphere for centuries, Atlanta rapper B.o.B remains unconvinced. For some inexplicable reason, he has been on a Twitter tear, trying to prove that the earth is flat and isn’t listening to anyone trying to convince him otherwise.

This all started Sunday night, when B.o.B posted a picture of himself standing outside with cities behind him. Since he couldn’t see the curvature of the earth, he is convinced that it doesn’t exist. Many of his Twitter followers tried to tell him that he wasn’t standing at a high enough point to see the curvature, but he wouldn’t have any of that.

No matter what sciences says - or what your eye shows you when you are flying - B.o.B was unconvinced. He even claimed that when he was on a plane for the famous Red Bull Stratos jump in 2012, when Felix Baumgartner jumped from a space capsule, notes Yahoo. But B.o.B says that there was no curve.

He also questioned the size of North America.

B.o.B is still going on this. Hopefully Neil DeGrasse Tyson wakes up soon so he can prove to the rapper that the earth is round. Or maybe B.o.B is just trolling all of us?