Systematic bone tool production at 1.5 million years ago - Nature.com

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1. Systematic bone tool production at 1.5 million years ago  Nature.com
2. Trove of Ancient Axes Shows Early Humans Made Tools From Bones  The New York Times
3. Archaeologists uncovered a cache of 1.5 million-year-old bone tools. They’re trying to determine who made them  CNN
4. 1.5 million-year-old bone tools crafted by human ancestors in Tanzania are oldest of their kind  Livescience.com

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