Great Rift Valley Great Rift Valley ras manusia purba HOMO early transitional humans Early Transitional Humans palomar.edu http://anthro.palomar.edu/homo/homo_1.htm HOMO http://anthro.palomar.edu/homo/homo_1.htm http://anthro.palomar.edu/homo/homo_1.htm http://anthro.palomar.edu/homo/homo_1.htm HOMO http://anthro.palomar.edu/homo/homo_1.htm Great Rift Valley http://anthro.palomar.edu/homo/homo_1.htm Great Rift Valley Early Transitional Humans http://anthro.palomar.edu/homo/homo_1.htm early transitional humans Early Transitional Humans early genus Homo Early Transitional Humans Early Transitional Humans HOMO