The scientific argument if the world is round or flat has been reduced to a rap battle. Rapper B.o.B fired the opening salvo on Sunday by releasing a diss track, “Flatline,” insisting that the world is flat.

Celebrity astrophysicist Neil deGrasse Tyson replied on Monday by coming out with his own diss track, "Flat to Fact." In his 3-minute, 30-second video, the Grammy-nominated rapper not only insulted Tyson, but also the Jews.

Since Tyson is not a rapper, he had his nephew, Steve Tyson, perform the 3-minute, 5-second diss track which ends with the astrophysicist reading one of his tweets to B.o.B. re/code comments that between the two, the rapper’s diss track is better because Tyson’s version “sounds like rap-ified ‘Schoohouse Rock.’” However, the Web site stressed that the battle of the diss tracks has no winner and everyone else listening to the raps is a loser.

Besides releasing the diss track, B.o.B, whose real name is Bobby Ray Simmons Jr., also tweeted over the past two days popular conspiracy theories on various science events such as the Apollo moon landing in 1969 which some people think was faked by NASA. Another one is cloning and, of course, Galileo’s proof that the world is round as the rapper dared world governments to allow travel through Antarctica to prove his belief that the world is flat and Earth ends there.

In turn, Tyson also tweeted to debunk B.o.B’s scientific misconceptions, explaining that it is the Earth’s curve why views of Manhattan towers taller than 150 feet are blocked and Polaris is gone by 1.5 degrees S. Latitude because the rapper has never been to south of the Earth’s equator or never looked up.

In siding with Tyson, Popular Science points out that the Earth is round is not only the most basic of scientific facts that children learn. It stresses it is a proven fact of physical reality. The magazine criticises the rapper for perpetuating ignorance and adds that the feud he created with Tyson lessens the good opportunity to tap rap music as a tool to educate people about science as it underscores that “the idea that the Earth is round isn’t exactly up for debate.”

Nevertheless, Tyson ends the word war by tweeting, “Duude – to be clear: Being five centuries regressed in your reasoning doesn’t mean we all can’t still like your music.” The Web site notes that B.o.B is not the only celebrity who believes in weird stuff and reminds readers not to get their science from the rapper.

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