Model Homo Habilis Oh 24 Cranium, 1.8 MYA, was discovered by P. Nzube in 1968. This nearly complete but very badly crushed specimen constituted the oldest hominid found in Olduvai Gorge, Tanzania, Size: 18.3L x 11.6W x 10.1H (cm)
Model H. Ergaster Knm-Er 3733 Cranium, 1.75 MYA, with dentition was discovered by B. Ngeneo in 1975 in Koobi Fora, Kenya. Several teeth are intact, but no mandible was ever found, Size: 19.1L x 13W x 13.5H (cm)
Model A.Africanus Sts 5 Mrs. Ples Cranium, 2.5 MYA, was discovered in 1947 by R. Broom and J. Robinson in Sterkfontein, Transvaal, South Africa, Size: 17.2L x 12.3W X 13.1H (cm)
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 A. Boiseioh5(Zinjanthropus)Cranium, 1.8 MYA, most famous fossil from Olduvai Gorge, Tanzania. OH5 was discovered by Mary Leakey in 1959. The accepted genus name has since changed to Australopithecus, Size: 19.5L x 16.1W X 17.2H (cm)
Model Homo Sapiens Cro-Magnon 1 Cranium, 30,000-32,000 YA, discovered by L. Lartet and H. Christy on a cliff in 1868 (during the construction of railway lines in Les-Eyzies, France), Size: 21L x 15.2W X 17H (cm)
Model Homo Habilis Knm-Er 1813 Cranium, 1.9 MYA, was discovered by K. Kimeu in 1973 at Koobi Fora, Kenya, and described by R. Leakey in Nature in 1973, Size: 17.1L x 11.8W x 11.6H (cm)
Model A. Robustus Sk-48 Cranium, 1.5-2 MYA, was discovered by Fourie in South Africa in 1950. SK-48, formerly Paranthropus crassidens, greatly increased what is known about australopithecines, Size: 15.6L x 15.1W X 12.3H (cm)