Sir David Frederick Attenborough is an English broadcaster, natural historian and author. He is best known for writing and presenting, in conjunction with the BBC Natural History Unit, the nine natural history documentary series forming the Life collection, a comprehensive survey of animal and plant life on Earth. Attenborough was a senior manager at the BBC, having served as controller of BBC Two and director of programming for BBC Television in the 1960s and 1970s. His filmography as writer, presenter and narrator spans eight decades; it includes Zoo Quest, Natural World, Wildlife on One, the Planet Earth franchise, The Blue Planet and its sequel. He is the only person to have won BAFTAs in all of the categories black and white, colour, high-definition, 3D and 4K resolutions. While Attenborough's earlier work focused more on the wonders of the natural world, his later work has been more vocal in support of environmental causes.