Springer Nature offers the paper in a open viewing form at the following link;
nature ecology & evolution
A surge in obsidian exploitation more than 1.2 million years ago at Simbiro III (Melka Kunture, Upper Awash, Ethiopia)
Margherita Mussi, Eduardo Mendez-Quintas, Doris Barboni, Hervé Bocherens, Raymonde Bonnefille, Giuseppe Briatico, Denis Geraads, Rita T. Melis, Joaquin Panera, Laura Pioli, Andrea Serodio Domínguez, Susana Rubio Jara
Received: 1 February 2022
Accepted: 6 December 2022
Published online: 19 January 2023
Pleistocene archaeology records the changing behaviour and capacities of early hominins. These behavioural changes, for example, to stone tools, are commonly linked to environmental constraints. ....
https://www.nature.com/articles/s41559-022-01970-1.epdf?sharing_token=lafCCsHHzzWESA7sSuGX7NRgN0jAjWel9jnR3ZoTv0NGmuX0lR0PD9NHM-U5P9w1k72oVvbMm7gEpl_5Bp2o2TBsd05wHi4R0I6o8cjdmKC6hCsy3MD6bxCPnEg8vo7mwfvT472zV07DscOFWcyjy4p-sauNj74PScVUcaDeAfke35GidiboWbTLO5LsC0KpqGq8CMpTPTyJRO6WGjqd2le_aZiMeDlr4jMAzajm_dU%3D&tracking_referrer=www.livescience.comThat link is located at the end of the Live Science article but is in this condensed form;
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