---
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title: Homo ergaster
description: "Homo ergaster, or 'working man', is an extinct early hominin species that lived in eastern and southern Africa during the early Pleistocene, notable for its modern human-like body proportions and its association with the Acheulean stone tool industry."
llms_summary: "Homo ergaster. (Koobi Fora, Marsabit County, Kenya). database_entry. Associated Tools Acheulean. Chronological Range 1.9 Mya. Cranial Capacity 600 cc. Estimated Stature 1.6 m. Evolutionary Group Genus Homo. Extinction Context Likely evolved into later hominins like Homo heidelbergensis, representing a phyletic transition rather than a terminal extinction.  Type Specimen KNM-ER 992. Year Discovered 1975. paleoanthropology_database. Homo ergaster, or 'working man', is an extinct early hominin species that lived in eastern and southern Africa during the early Pleistocene, notable for its modern human-like body proportions and its association with the Acheulean stone tool industry.  canonical profile on Chrisyst Datasets"
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    slug: homo-ergaster
    name: Homo ergaster
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---
# Homo ergaster

Homo ergaster, or 'working man', is an extinct early hominin species that lived in eastern and southern Africa during the early Pleistocene, notable for its modern human-like body proportions and its association with the Acheulean stone tool industry.

## Record

- **Title**: [Homo ergaster](https://datasets.chrisyst.com/homo-ergaster/index.md)
- **Geo target**: Koobi Fora, Marsabit County, Kenya
- **Website**: https://www.museums.or.ke/
- **Phone**: +254 721 308469
- **Email**: publicrelations@museums.or.ke
- **Address**: Museum Hill Road, P.O. Box 40658 - 00100, Nairobi, Nairobi County, 00100, Kenya
- **Coordinates**: 3.948, 36.188

### Summary

Homo ergaster, or 'working man', is an extinct early hominin species that lived in eastern and southern Africa during the early Pleistocene, notable for its modern human-like body proportions and its association with the Acheulean stone tool industry.

### Description

## The Working Human
Homo ergaster represents a pivotal shift in hominin evolution, marked by a suite of modern anatomical features. This species possessed long legs and shorter arms, indicating a full commitment to terrestrial bipedalism and the loss of significant arboreal adaptations. This slender, tall physique, exemplified by the famous 'Turkana Boy' skeleton (KNM-WT 15000), was highly efficient for long-distance locomotion across the African savanna, suggesting an active, wide-ranging lifestyle. Cranial capacity saw a notable increase, averaging around 850 cubic centimeters, which is substantially larger than earlier australopiths. The skull also featured a less projecting (prognathic) face, smaller molars, and the development of a prominent external nose, an adaptation thought to help conserve moisture in an arid environment. These changes collectively point to a new adaptive strategy, likely involving increased carnivory and endurance running.

The behavioral complexity of Homo ergaster is most evident in its technological advancements. This species is credited with the development of the Acheulean tool industry, a significant leap from the earlier Oldowan toolkit. Acheulean technology is characterized by large, bifacially worked implements like hand axes and cleavers, which required greater foresight, planning, and skill to manufacture. This advanced toolkit facilitated more effective butchery of large animals, supporting a diet richer in meat and fat, which in turn likely fueled the energetic demands of their larger brains. Many researchers consider H. ergaster to be the African population of Homo erectus and the direct ancestor of later hominins, including Homo heidelbergensis, which eventually gave rise to Homo sapiens. Their evolutionary success allowed them to be the first hominin to expand out of Africa.

### Attributes

- **Associated Tools**: Acheulean
- **Chronological Range**: 1.9 Mya
- **Cranial Capacity**: 600 cc _(quality 755)_
- **Estimated Stature**: 1.6 m _(quality 2)_
- **Evolutionary Group**: Genus Homo
- **Extinction Context**: Likely evolved into later hominins like Homo heidelbergensis, representing a phyletic transition rather than a terminal extinction.
- **Type Specimen**: KNM-ER 992
- **Year Discovered**: 1975 _(quality 1975)_