Prehistoric technology Ground and polished stone tools continued to be created and used during the Neolithic period. Numeric record keeping evolved from a system of counting using small clay tokens that began in Sumer about 8000 BC. The Stone Age developed into the Bronze Age after the Neolithic Revolution. The Neolithic Revolution involved radical changes in agricultural technology which included development of agriculture, animal domestication, and the adoption of permanent settlements. The Bronze Age is characterised by metal smelting of copper and its alloy bronze, an alloy of tin and copper, to create implements and weapons. Polished stone tools continued to be
Pre-Pottery Neolithic Pre-Pottery Neolithic The Pre-Pottery Neolithic (PPN, around 8500-5500 BCE) represents the early Neolithic in the Levantine and upper Mesopotamian region of the Fertile Crescent. It succeeds the Natufian culture of the Epipaleolithic (Mesolithic), as the domestication of plants and animals was in its formative stages, having possibly been induced by the Younger Dryas. The Pre-Pottery Neolithic culture came to an end around the time of the 8.2 kiloyear event, a cool spell centred on 6200 BCE that lasted several hundred years. The Pre-Pottery Neolithic is divided into Pre-Pottery Neolithic A (PPNA 8500 BCE - 7600 BCE) and the following Pre-Pottery