From flat Earth truther to slave trade conspiracy theorist? All in a day's work for rapper B.o.B, who stated via Instagram recently that there isn't enough credible evidence to prove that the slave trade ever existed in the United States.

Sharing an old-school video that calls into question the accuracy of historical maps gleaned from eras that passed us by centuries ago, B.o.B captioned the clip with the following: "They say slavery lasted 400 yrs... America is only 250 yrs old... You ever seen a slave ship ? They can find a billion year old dinosaur bone but can't find any slave ships." You can view the video in its entirety below.

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As expected, those who showed up in the comments section weren't about the let the rapper make a statement like that and not hear some criticism for it. As one user put it, "they're are slaves ships at the Smithsonian African American Museum, National Museum of African American History and Culture. New Orleans just got approved for a project called the Slave Ship Museum and there's also the International Slave Museum in Liverpool, England [...] Google's your friend brah." Many more chimed in with similar sentiments, citing the fact that the bones of slaves who suffered through unspeakable horrors have been found, studied and preserved for the very reason of acknowledging that the slave trade was a real thing. If you're going by what his followers had to say after the fact, B.o.B was left holding a big L after this post.

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This sort of controversial social media content shouldn't necessarily surprise those who have followed the rapper's career over the past year. Back in September, B.o.B started a GoFundMe campaign so that he could prove, once and for all, that the Earth is flat. Calling himself "Flat Earth Bob," he made a video message for his fans that said “I’m starting this GoFundMe because I would like to send one, if not multiple satellites as far into space as I can, or into orbit as I can, to find the curve. I’m looking for the curve.” At last look, his fundraising goal was $200,000.