East Africa, including Kenya, is one of the earliest regions where modern humans (''Homo sapiens'') are believed to have lived. Evidence was found in 2018, dating to about 320,000 years ago, at the Kenyan site of Olorgesailie, of the early emergence of modern behaviours  including long-distance trade networks (involving goods such as obsidian), the use of pigments, and the possible making of projectile points. It is observed by the authors of three 2018 studies on the site, that the evidence of these behaviours is approximately contemporary to the earliest known ''Homo sapiens'' fossil remains (such as at Jebel Irhoud in Morocco and Florisbad in South Africa), and they suggest that complex and modern behaviours had already begun in Africa around the time of the emergence of the species ''Homo sapiens''.