We're not sure what to call this one -- North Pole vs. South Pole? Over the Rainbow beef?

On Sunday, Decatur-raised rapper Bobby Ray Simmons, Jr. aka B.o.B took to Twitter to prove the earth is flat .

Yesterday, astrophysicist Neil DeGrasse Tyson took the time to offer some scientific explanations to B.o.B's continued Tweets on the topic:

B.o.B responded by getting back in his lane and starting a rap beef with Tyson (except Tyson doesn't rap as far as we know, so...)

B.o.B released a song on SoundCloud directed at Tyson and his many other doubters. The song features recordings of Tyson's voice (CAUTION! SOME EXPLICIT LYRICS):

But um, B.o.B said he definitely isn't doing this for publicity or to sell records.

Tyson, thus far, seems to not give a cosmo.

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