Sir David Attenborough's landmark natural history programmes have educated and inspired us for more than seven decades. From hanging out with primates to early climate warnings, here's a selection of his trailblazing programmes - to mark his 100th birthday - and where to watch them in the UK. Life on Earth was Attenborough's ambitious, globe-spanning attempt to tell the story of life in a way that had never been attempted before, "from the first primitive cells to the plants and animals that