JAVIER TRUEBA / MSF / SCIENCE PHOTO LIBRARY JAVIER TRUEBA / MSF / SCIENCE PHOTO LIBRARY
Homo ergaster. Model of a male Homo ergaster. H. ergaster was a hominid that emerged about 1.9 million years ago in Africa. It is considered to be an ancestor of later Homo populations. H. ergaster had a rounded cranium and prominent brow. H. ergaster is associated with an advance in stone tool technology that occurred around 1.6 million years ago.
Model release not required. Property release not required.