Not only has he given his name to the UK's new polar ship but Sir David has also lent his voice.
By Jonathan Amos
BBC Science Correspondent
A personal reply from Sir David Attenborough has heartened a group of environmental campaigners in Carlisle.
The "Save Deer Park Field" group is opposing plans to build up to 80 homes on an area of land near the Kingmoor Sidings Nature Reserve.
The group says the area is popular with nature enthusiasts, but Carlisle City Council planning officers have recommended approval at a meeting tomorrow.
Pat Duncan from the campaign said Sir David said he understood their concern but as he knew nothing about the site itself, they should contact the Cumbria Wildlife Trust.Copyright: ReutersQuote Message: That this great man took the time and the effort to hand-pen a letter with some advice, meant a lot not just me but too all the people who are in the Deer Park Field Group." from Pat Duncan
By Justin Rowlatt
Chief environment correspondent
Renowned broadcaster, Sir David Attenborough, says the excesses of capitalism have to be "curbed" in order to help the natural world "flourish again".
From monkeys to spiders - Prince George, Princess Charlotte and Prince Louis ask about the natural world.
David Attenborough's new book A Life On Our Planet - My Witness Statement and a Vision for the Future is out on October 1st. His new film is called A Life On Our Planet.
By Helen Briggs
His hope for the future of the planet lies in the hands of children, so what do they want to ask him?
BBC Breakfast spoke to Sir David Attenborough ahead of his new documentary A Life on Our Planet.