A warning to Aboriginal and Torres Strait Islander viewers, this story contains the name and image of a person who has died, used with the permission of his family. Trailblazing Rirratjiŋu clan elder M Marika has died in north-east Arnhem Land at the age of 64. He dedicated his life to protecting the natural environment, his people and their culture. Mr Marika's clan group says his legacy endures through the generations he helped inspire.