Rapper B.o.B. took to Twitter on Sunday to try and convince people that the Earth is flat. B.o.B., whose real name is Bobby Ray Simmons, Jr., started by asking his followers to explain why he was unable to see the curvature of the Earth in a picture where two cities, which he says are 16 miles apart, can both be seen in the background.

Some followers were unsure whether B.o.B. was really asking if the Earth is round:

While some offered their solutions to his problems:

But this didn't deter the 'Airplanes' artist, who challenged one follower by asking "have u been to the edge?"

He went on to say that the horizon is always eye level, "no matter how high in elevation you are".

Along with a number of high altitude images, B.o.B. linked to two videos, one entitled "The Zionists, Freemasons, and NASA's Biggest Secret" and the other about "Dissecting the Flat Earth Theory". He then went on to challenge NASA's photographs of the Earth from space.

He also posted a number of tweets questioning the visible horizon:

He then posted a picture suggesting that people replying to him were all 'sheep'.

As yet, there is no statement from the Flat Earth Society...