It is estimated that more than a thousand cultural groups exist in Papua New Guinea. Because of this diversity, many styles of cultural expression have emerged. Each group has created its own expressive forms in art, dance, weaponry, costumes, singing, music, architecture and much more.
Most of these cultural groups have their own language. People typically live in villages that rely on subsistence farming. In some areas people hunt and collect wild plants (such as yam roots) to supplement their diets. Those who become skilled at hunting, farming and fishing earn a great deal of respect.
On the Sepik river, there is a tradition of wood carving, often in the form of plants or animals, representing ancestor spirits.
Sea shells are no longer the currency of Papua New Guinea, as they were in some regions — sea shells were abolished as currency in 1933. This tradition is still present in local customs. In some cultures, to get a bride, a groom must bring a certain number of golden-edged clam shells as a bride price. In other regions, the bride price is paid in lengths of shell money, pigs, cassowaries or cash. Elsewhere, it is brides who traditionally pay a dowry.
People of the highlands engage in colourful local rituals that are called "sing sings". They paint themselves and dress up with feathers, pearls and animal skins to represent birds, trees or mountain spirits. Sometimes an important event, such as a legendary battle, is enacted at such a musical festival.
Sport is an important part of Papua New Guinean culture and rugby league is by far the most popular sport. In a nation where communities are far apart and many people live at a minimal subsistence level, rugby league has been described as a replacement for tribal warfare as a way of explaining the local enthusiasm for the game (a matter of life and death). Many Papua New Guineans have become instant celebrities by representing their country or playing in an overseas professional league. Even Australian rugby league players who have played in the annual State of Origin series, which is celebrated feverishly every year in PNG, are among the most well known people throughout the nation.
State of Origin is a highlight of the year for most Papua New Guineans, although the support is so passionate that many people have died over the years in violent clashes supporting their team. The Papua New Guinea national rugby league team usually plays against the Australian Prime Minister's XIII (a selection of NRL players) each year, normally in Port Moresby.
Other major sports which have a part in the Papua New Guinea sporting landscape are Australian rules football, Association football, rugby union, basketball and, in eastern Papua, cricket.
The capital city, Port Moresby, hosted the Pacific Games in 2015.