What a wonderful world – BBC celebrates Sir David Attenborough

Sir David Attenborough, brother of the late Sir Richard, is one of Britain's most valuable assets. The country's national broadcaster knows it well, and in this two minute advert, first flighted in 2011, the BBC highlights his talents. His brother's death last month was a loss. But Sir David continues to warm our hearts by showcasing our amazing planet. The advert has been viewed more than 12m times. A classic that will never age. What a wonderful world. – AH