On Tuesday evening, Astrophysicist Neil deGrasse Tyson dropped his own diss track in response to rapper B.o.B., who yesterday dissed Tyson in a song about his belief that the Earth is flat. The gloves are off: this is now a full-blown rap battle and Twitter feud.

B.o.B. believes that the earth is flat, and that there is a conspiracy to cover up the truth. In his track "Flatline," he rapped, "Neil Tyson needs to loosen up his vest, they'll probably write that man one hell of a check."

And so it begins.
And so it begins.
Sources: Twitter | Los Angeles Times