Story highlights 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.

Astrophysicist Neil deGrasse Tyson felt compelled to politely point out the scientific inaccuracies in B.o.B.'s argument. In response, the rapper released a diss track, "Flatline" in which he compared himself to Malcolm X.

The bizarre song also suggested listeners research Holocaust denier David Irving and discussed conspiracy theories about Freemasons and "mirror lizards." The track has since been taken down from Soundcloud, the site where it had been posted.

Tyson then hit back with his own track -- laid down by his nephew, Stephen.

Dear @bobatl, as an astrophysicist I don't rap, but I know people who do. This one has my back: https://t.co/BbMi4tzHLz — Neil deGrasse Tyson (@neiltyson) January 26, 2016

But he wasn't done there. Tyson took the Twitter beef off the social media platform and into the real world. And now B.o.B may be regretting his tweet: "Once you go flat, you never go back."