An area containing early agricultural sites in Papua New Guinea’s Wahgi Valley has been added to UNESCO's world heritage list, PNG’s first entry on the list. Excavations have shown the Kuk agricultural sites have been continuously worked for between 7,000 and 10,000 years.

"It is an excellent example of transformation of agricultural practices over time, from cultivation mounds to draining the wetlands through the digging of ditches with wooden tools," said a UNESCO statement.

Source: ‘Asian sites win UNESCO world heritage status’, 8 July 2008, Agence France-Presse