ocr: 360,000,000BC 10,00UBC 360,000,000 BC 0300,000 BC 040,000 BC tetrapod ax & wedge hearths 150,000 BC knife 1,000,000 BC machines 250,000 BC 120,000 BC 1,000,000 BC brain size post & beam stone tools 200,000 BC homo sapiens 200,000 BC standard tools
