In a remote cave system in the Caucasus Mountains, researchers have discovered a cache of 18,000-year-old obsidian tools featuring micro-engravings. These engravings, invisible to the naked eye and identified only through scanning electron microscopy, depict intricate geometric patterns and abstract animal forms.
The precision of these Paleolithic carvings suggests a level of symbolic complexity and manual dexterity previously thought to have emerged much later. Experts believe the engravings may have served as clan markers or ritualistic symbols, indicating a highly organized social structure among the Upper Paleolithic hunters of the region.