KNM-ER 42700

This cranium of a young adult has one of the smallest brain sizes known in Homo erectus–similar to brain size seen in some Homo habilis  fossils, but it has features more similar to other Homo erectus crania. It was found in an area of northern Kenya where younger fossils of Homo habilis have been found, demonstrating that these two species existed at the same time, rather than H. habilis being ancestral to H. erectus.

Image of KNM-ER 42700; Ileret, Kenya, skull, 3/4 view
Homo erectus skull, KNM-ER 42700; Ileret, Kenya
Image of KNM-ER 42700 skull; Ileret, Kenya, side view
KNM-ER 42700
Exhibit item
Koobi Fora, Kenya
Date of discovery: 
Discovered by: 
A team led by Meave Leakey
About 1.55 million years old
Homo erectus