Researchers surveyed ancient Arabian desert, finding evidence of lakes but no early human tools

Scientists have made new discoveries about the Arabian peninsula. Simple fifth-grade science would have us believe that we need just three things to survive: air, water and food. So, when scientists discovered evidence of freshwater lakes across the interiors of the Arabian Peninsula, they expected to find traces of large prehistoric human settlements. Surprisingly, most archaeological evidence of human occupation was found around the desert's outskirts, rather than its water-rich interior. What was keeping humans away?A new study published in Nature on 28 October 2026 offers an interesting explanation. Researchers suggest that early humans did not simply settle wherever they found freshwater. They also needed access to particular types of stone to make tools, which were essential to their everyday survival.What was Green Arabia?You would be surprised to know that the dry, arid sea of sand that the Arabian Peninsula is today was, at multiple points throughout history, considerably greener. This is what scientists refer to as ‘Green Arabia’.Over the past eight million years, large parts of the peninsula have experienced repeated periods of wetter weather, supporting lakes, rivers, g...