1.4-million-year-old handsax was detected in Ethiopia. Archeology, Palaeanthropology

Paleoanthropologists working in the Kono research area in Ethiopia have found 1.4 million years old large bone fragments in a hexa-like shape.

1.4 million years old bone immersion was recovered from the Konso research area in Ethiopia. Picture Sincerely: Sano and others, doi: 10.10 / 3 / pars.2006370117

The newly discovered handax is a bifurcated layer of the hippopotemus femur (throat bone).

The spectacularly preserved device, measuring 12.8 by 7.5 by 7.5 cm, was found in the Konso Formation in southern Ethiopia.

The ancient artifacts were analyzed by University of Tokyo Paleontropologist General Suva and his colleagues from Japan, Ethiopia and Hong Kong.

Researchers found that the handax has at least 44 secondary layer marks (28 on the cortical face and 16 on the inner face). They range in size from 3 cm to less than 1 cm.

“Both the distribution pattern of flank scars and the high frequency of cone fractures are strong indicators of intentional flaking,” he said.

“Haxx is made with sufficient sophistication as does a large number of small, well-controlled cortical side removals, for example, in creating a hand-like shape.”

“Fine bifacial flaking created a relatively straight edge in the side view, enabling efficient cutting.”

“Use-wear analysis suggests that one of the main edges was possibly used for cutting and cutting.”

Which was likely to produce and use handso Homo erectusA large bodied hominin, which lived between 1.9 million and 108,000 years ago.

“Taking this bone in hand suggests that in Konso, not only in lithic technique, but also in bone modification, Homo erectus Scientists were sufficiently skilled to use and use sustainable cutting edge, ”the scientists said.

The bone device is the oldest known widely layered example from the early Pleistocene period.

This is only the second bone tool identified as a handax from the early Achulean, a type of stone tool industry characterized by large biffs.

“The discovery of Bono’s hand bone made thin 1.4 million years ago suggests that the refining of the flanking technique in early Aeschulean encompasses both stone and bone and provides additional evidence of African’s technical and behavioral sophistication. Homo erectus The author said, “Through Auclane Time.”

His letter was published in Proceedings of the National Academy of Science.


Katsuhiro Sano and others. There is a 1.4-million-year-old bone arm from Konso, Ethiopia, reflecting advanced instrumentation techniques in early Achulian. PNAS, Published July 13, 2020; Doi: 10.10i3 / pannas.200317171173