Sir David Attenborough (96) is an English broadcaster, biologist, 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's contribution to broadcasting and wildlife film-making has brought him international recognition. He has been called 'the great communicator, the peerless educator' and 'the greatest broadcaster of our time.' We look at his upbringing, marriage and career.