It seems that humans aren't the only creatures to have evolved in Africa. Of course, I'm pretty sure Africa wasn't actually Africa, in appearance or location, at the start of the Triassic. Also, it may not be that the creatures evolved in that spot. Rather, it may simply be a case of the right stratigraphy being exposed in that precise spot. Anyway, it's a damned old dinosaur, is all I'm sayin'...