Here are some of the key dates in the history of tool development:
* 2.6 million years ago: The earliest known stone tools were found in Ethiopia. These tools were simple stones that were used for pounding and cutting.
* 1.8 million years ago: Hand axes, which are more sophisticated stone tools, began to appear in Africa. Hand axes were used for a variety of tasks, including hunting, butchering, and woodworking.
* 500,000 years ago: Spears, which are long, pointed objects that were used for hunting, began to appear in Africa. Spears allowed humans to kill animals at a distance, which made hunting more efficient.
* 10,000 years ago: Bows and arrows, which are ranged weapons that were used for hunting and warfare, began to appear in Africa and Eurasia. Bows and arrows allowed humans to kill animals from a greater distance, which made hunting even more efficient.
The development of tools has been a key factor in human evolution. Tools have allowed humans to adapt to new environments, to become the dominant species on Earth, and to create complex civilizations.