... themtodecideononehandthat it was the progenitor of the chimpanzee, the go-rilla, and theorangutan, and yet onthe other hand wastheprogenitorofthehumanrace?(1995,p.223).In the end, however, as Pilbeam ... would be the youngest common an-cestor of man and the African apes, for by the time we find Dryopithecus in the fossils, accord-ing to the traditional picture, the line of Rama-pithecus and ... phonation; the modification of the central ner-vous system, notably at the level of the temporal lobes,permitting the specific recognition of speech. From the point of view of embryogenesis, these...