Four years in the making, and filmed over 3000 days across every continent and in every habitat, see 130 incredible stories from frontiers of the natural world. Discover the glorious variety of life on Earth and the spectacular and extraordinary tactics animals and plants have developed to stay alive. This is evolution in action: individual creatures under extreme pressure to overcome challenges from adversaries and their environment.

Originally broadcast on the BBC in 2009. Special features: production video diaries, deleted scenes, music only viewing option.