1.2-Million-Year-Old Obsidian Axe Factory Found In Ethiopia
An unknown species of human apparently mastered obsidian, something it had
been thought only occurred in the Stone Age
Ben Tuab, IFL Science, December 24, 2023
[www.iflscience.com]

The paywalled paper is:

Mussi, M., Mendez-Quintas, E., Barboni, D. et al. A surge in
obsidian exploitation more than 1.2 million years ago at
Simbiro III (Melka Kunture, Upper Awash, Ethiopia). Nature
Ecology and Evolution. [doi.org]
[www.iflscience.com]

Yours,

Paul H..

"The past is never dead. It's not even past."
William Faulkner, Act 1, Scene III, Requiem for a Nun (1951)