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"Scientists have discovered a trove of nearly 600 #obsidian hand-axes that were crafted more than 1.2 million years ago in #Ethiopia by an unknown group of #hominins, the family consisting of modern humans and our many extinct relatives".

"The new study opens a tantalizing window into the mysterious hominin community that lived in this river ecosystem 1.2 million years ago, and learned to take advantage of some of the most challenging resources in its environment."