At one time, B.o.B was known for his 2009 smash hit "Nothin' on You," thanks to a catchy Bruno Mars hook. 

But in recent years, the Atlanta rapper has been more known for saying the Earth is flat, a theory he started giving in 2016. 

B.o.B said that he feared for his life after talking about it.

“For me it wasn’t even so much the flat earth sh*t, but it was like when I was doing the elements sh*t and cloning and all that sh*t, bro, it's like, I was for sure, I was like, ‘They gon' try and get me, bruh,'"he told HipHopDX. "Because you know it’s like most people when they go through that type of sh*t, that awakening phase, they do it on their own time, but me I did it in public.”

B.o.B also spoke about his 2016 Twitter debate with well-known astrophysicist Neil deGrasse Tyson about the Earth being flat.

"I was like, ‘Who the f*ck?’ Then, somebody was like, ‘You should make a song called 'Flatline,' and I was like, ‘Yeah man, f*ck yeah I’m doing this now,'" he explained. "So I’m just like unloading the whole clip and just like ‘F*ck it, f*ck it, f*ck it, f*ck it,’ and in hindsight that’s some wild ass sh*t.”

Have you given any thought to B.o.B's flat Earth theory over the years?