Model A. Boisei Knm-Er 406 Cranium, 1.7 MYA, was discovered by R. Leakey at Kenya, in 1969. This discovery helped support the classification of boisei as a separate species of Australopithecus, Size: 19.9L x 17.1W x 11.8H (cm)
Model Australopithecus Afarensis Skull, 2.9-3.6 MYA. A, represented early hominid with more than 100 fossils representing the species. They had ape-sized brains: their cranial capacity ranged from 375 - 530 cc, Size: 19.3L x 14.9W x 18.3H (cm)