David Attenborough series on the natural history of the polar regions; Attenborough appeared on screen and authored the final episode, in addition to performing voiceover duties. Attenborough introduced and narrated the Unit's first 4K production "Life Story." For "Planet Earth II" (2016), Attenborough returned as narrator and presenter, with the main theme music composed by Hans Zimmer. In October 2014, the corporation announced a trio of new one-off Attenborough documentaries as part of a raft of new natural history programmes. "Attenborough's Paradise Birds" and "Attenborough's Big Birds" was shown on BBC Two and "Waking Giants", which follows the discovery of giant dinosaur
David Attenborough bones in South America, aired on BBC One. The BBC also commissioned Atlantic Productions to make a three-part, Attenborough-fronted series Great Barrier Reef in 2015. The series marked the 10th project for Attenborough and Atlantic, and saw him returning to a location he first filmed at in 1957. By the turn of the millennium, Attenborough's authored documentaries were adopting a more overtly environmentalist stance. In "State of the Planet" (2000), he used the latest scientific evidence and interviews with leading scientists and conservationists to assess the impact of man's activities on the natural world. He later turned to the issues