B.o.B. is back with the fourth and final installment of his element series, A.I.R. (Art Imitates Reality).

The 11-track effort comes after the ATLien released W.A.T.E.R. (We Are The Enemy Really), F.I.R.E. (False Idols Ruined Egos) and E.A.R.T.H. (Educational Avatar Reality Trailing Habitat). For his latest project, B.o.B. goes solo dolo with no features -- he also produced all of the tracks.

The series seems to fall in line with B.o.B.'s conspiracy theory that the Earth is flat -- not round.

Earlier this year, he tweeted "No matter how high in elevation you are… the horizon is always eye level … sorry cadets… I didn’t wanna believe it either."

Afterwards he shared some "evidence" of the theory with a photo of himself standing 16 miles away from a skyline that he claims shouldn't be able to be seen if there is indeed a curve.

Luckily, renowned astrophysicist Neil deGrasse Tyson was quick to drop some science knowledge and explain to B.o.B. why he's wrong.

"Earth's curve indeed blocks 150 (not 170) ft of Manhattan. But most buildings in midtown are waaay taller than that," he said.

But it seems that B.o.B. is keeping hope alive -- even after Tyson broke down the facts in a rap, "Flat to Fact," on the newly canceled The Nightly Show with Larry Wilmore.

But as Tyson said -- "Being five centuries regressed in your reasoning doesn’t mean we all can’t still like your music."

Therefore, check out the album below, and let us know what you think in the comments.

Listen to B.o.B.'s A.I.R. (Art Imitates Reality)

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