Neil DeGrasse Tyson decided to take matters into his own hands in the most unlikely feud of the century. He appeared on 'The Nightly Show' to set the record straight with a diss rant that would put any wannabe rapper in their place. He finish his verbal beat down of B.O.B by saying "The Earth isn't Fucking Flat!", then adds, "and by the way, this is called gravity", before dropping the mic. The Earth may not be flat, but B.O.B's ego sure is.