Metatool: Robots are learning how to create new tools, just like the first humans once did

While they looked simple, their sharp edges were excellent for cutting objects and digging holes. It's unknown exactly how this occurred. But clearly, the transition from knowing how to use tools to learning how to build them was a significant cognitive leap, one that required advanced imagination and reasoning. This capacity is one of the things that most differentiates humans from animals. And today, it is what separates humans from robots… at least, for the time being.