Huffington Post Arabic (a Qatari regime mouthpiece) refers to Africa as "as the worst (in intelligence), as is the cast most of the times"

And they base it all on IQ tests which have been debunked, especially in Inequality by Design: Cracking the Bell Curve Myth, by Claude Fischer, Michael Hout, Martin Sanchez Jankowski, Samuel R. Lucas, Ann Swidler and Kim Voss, published by Princeton University Press.