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 of global warming ("The Truth about Climate Change", 2006) and human population growth ("How Many People Can Live on Planet Earth?", 2009). He also contributed a programme which highlighted the plight of endangered species to the BBC's "Saving Planet Earth" project in 2007, the 50th anniversary of the Natural History Unit. Attenborough also forged a partnership with Sky, working on documentaries for the broadcaster's new 3D network, Sky 3D. Their first collaboration was "Flying Monsters 3D", a film about pterosaurs which debuted on Christmas Day of 2010. A second film, "The Bachelor King 3D", followed a year later. His next