Iwi representatives from Northland and throughout the rest of the country have marched up Auckland's Queen Street in protest against deep sea oil drilling; The Waitangi National Trust is defending its decision to start charging New Zealanders to visit the Treaty Grounds; A former Labour Minister of Maori Affairs is calling for a referendum or poll on whether the Maori electorates are still needed in Parliament; Australian researchers claim that climate change enabled Polynesian explorers to colonise the east and south Pacific.