Finland was inhabited when the last ice age ended, approximately 9000 BCE. The first settlers left behind artefacts that present characteristics shared with those found in Estonia, Russia, and Norway. The earliest people were hunter-gatherers, using stone tools. The first pottery appeared in 5200 BCE, when the Comb Ceramic culture was introduced. The arrival of the Corded Ware culture in southern coastal Finland between 3000 and 2500 BCE may have coincided with the start of agriculture. The Bronze Age and Iron Age were characterised by extensive contacts with other cultures in the Fennoscandian and Baltic regions and the sedentary farming inhabitation increased towards the end of Iron Age. At the time Finland had three main cultural areas – Southwest Finland, Tavastia and Karelia – as reflected in contemporary jewellery.