 They used animal bone and horn to make tools, such as bone harpoons and digging sticks.They lived in circular huts made from wood, with rammed earth floors.Golbai Sasan, Sankarjang, Gopalpur, Ostapur, Suabarei and Khambeswaripali are some of the main sites in Odisha dating to the Neolithic-Chalcolithic periods.