They suggest the Natufian culture might have spoken a proto - Afroasiatic language just prior to its disintegration into sub-languages .
Some geneticists and archaeologists have argued for a back - migration of proto - Afroasiatic speakers from Western Asia to Africa as early as the 10th millennium BC .
geneticists suggest the Natufian culture might have spoken a proto - Afroasiatic language just prior to its disintegration into sub-languages .
Some geneticists and archaeologists have argued for a back - migration of proto - Afroasiatic speakers from Western Asia to Africa as early as the 10th millennium BC .