Sir David Attenborough (born May 8, 1926) is a broadcaster and naturalist. His career as the respected face and voice of natural history programmes has endured for more than 50 years. He is best known for writing and presenting the nine "Life" series, in conjunction with the BBC Natural History Unit, which collectively form a comprehensive survey of all life on the planet. He is also a former senior manager at the BBC, having served as controller of BBC Two and director of programming for BBC Television in the 1960s and 1970s.