1000 Inventions and Discoveries – Stone tools (c3,000,000BC)
The main difference between ourselves and most other animals is that we use tools.
The oldest known tools, found in Africa, were made more than two million years ago. They are simply lumps of stone that have been shattered with another stone to make a sharp edge for chopping meat or wood.
The people who made them would also have made tools from wood, but none have survived.