Boom! Watch Neil deGrasse Tyson Drop Mic on B.o.B's Flat-Earth Theory (Video)

The bizarre rap battle between astrophysicist Neil deGrasse Tyson and hip-hop artist B.o.B over the shape of the Earth now has a mic-drop moment. On Sunday and Monday (Jan. 24 and Jan. 25), B.o.B — whose real name is Bobby Ray Simmons Jr. —posted a number of photos on Twitter that showed flat horizons, claiming the images are evidence that the Earth is flat. Tyson responded via Twitter, gently pointing out the absurdity of this viewpoint.