Knowra Homo ergaster Homo ergaster Homo ergaster is an extinct hominin species known from Africa between roughly 1.9 and 1.4 million years ago. It is often classified as an early African form of Homo erectus.
KNM-ER 3733 : A largely complete Homo ergaster cranium discovered at Koobi Fora, Kenya, in 1975. This well-preserved skull anchors comparisons of the species’ cranial anatomy.
Homo erectus : An extinct human species that lived across Africa and Eurasia for well over a million years. Many researchers include African Homo ergaster fossils within this broader species.
Acheulean : A Lower Paleolithic archaeological industry characterized by shaped stone tools, especially handaxes. Acheulean tools appear in Africa during the period associated with Homo ergaster.
Species problem : The difficulty of defining and identifying species, especially in the fossil record. Sparse and variable fossils make the boundary between Homo ergaster and Homo erectus contested.
Turkana Boy : A nearly complete juvenile Homo ergaster skeleton found near Lake Turkana, Kenya. Its skeleton provides rare evidence about body proportions, growth, and locomotion.
Homo habilis : An extinct African hominin species associated with early Homo fossils from roughly 2.4 to 1.4 million years ago. Its fossils help frame the earlier hominin diversity preceding Homo ergaster.
Oldowan : An early stone-tool industry characterized mainly by simple flakes and cores. Its simpler tool tradition preceded or overlapped the emergence of Homo ergaster.
Paleoanthropology : The study of human evolution through fossils, archaeology, and related evidence. Research on this species depends on interpreting fragmentary fossils and ancient sites.
Dmanisi hominins : Early Homo fossils from Dmanisi, Georgia, dating to about 1.8 million years ago. Their classification tests how sharply African Homo ergaster differs from early Eurasian Homo.
Hominini : The primate tribe that includes modern humans and extinct species more closely related to humans than chimpanzees. Homo ergaster belongs to the evolutionary lineage represented by this tribe.
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