He has been besieged by birds, had 120m crabs try to crawl up his trouser leg and stayed cool beside an erupting Icelandic volcano. As David Attenborough turns 100, we celebrate his most extraordinary adventures Today, David Attenborough turns 100. He is, without question, Britain’s greatest national treasure; a man who has devoted his career to helping the public engage with the natural world. But his story is also the story of television. Attenborough joined the BBC just as television