B.o.B. and astrophysicist Neil deGrasse Tyson have been going back and forth in what is easily the most bizarre beef in rap history ever. It all started earlier this week, when the rapper took to Twitter to try to convince everyone that the world is indeed flat, and the astrophysicist responded in a series of tweets, disproving B.o.B.’s theory. This upset Bobby so much, he made a diss song about it, and Tyson then got his nephew to clap back on wax as well.

Last night, Tyson tried to end it by going on The Nightly Show, and he then spoke on it again outside of the show’s studio to TMZ cameras.

Check out both clips below.

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