BBC series Planet Earth II will be unparalleled, says Attenborough

Shot over three years in 40 countries, the spectacular wildlife blockbuster returns after a decade hiatus with a high-definition twistA lone eagle soars high above craggy mountain tops, the tips of its wings lifting lightly in the wind. A lemur leaps from tree to tree in a dense forest, the camera following the animal with every bound. An enormous grizzly bear wriggles his back against a tree, as if caught in an embarrassing dance.This is planet Earth, but not as you have ever seen it before. Th