Stone Age herders transported heavy rock tools to grind animal bones, plants and pigment
- Written by Maria Guagnin, Postdoctoral Researcher, Max Planck Institute of Geoanthropology

About 7,000 years ago, a small group of people sat around a fire, next to a small lake in what is now the Nefud Desert of northern Saudi Arabia.
We found some of the tools they left behind – and on close inspection of the tools, we discovered these Stone Age herders were busy grinding animal bones, wild...