- Neil deGrasse Tyson fires back at B.o.B on "The Nightly Show"
- Astrophysicist freestyle raps why flat Earth theory doesn't hold up
- Spat started Monday when B.o.B tweeted "knowledge" to followers
(CNN)It's the story that just keeps on giving. First, rapper B.o.B launched into an incredibly bizarre Twitter rant insisting that the Earth is flat and we've all been lied to.