1) Hand axes from 1.7-1.6 million years ago showed improved tool-making abilities in Homo erectus, featuring sharper edges used for tasks like hunting and butchering.
2) Cave paintings like those found in the Lascaux Caves of France dating back over 15,000 years depicted hunts of animals like deer and provided clues about early human life, family structures, and diets.
3) The artists used various natural materials and tools to create the cave paintings, such as mineral pigments mixed with binders and applied using tools like blown bird bone tubes, showing early technological innovation.