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Life in more depth:
Follow evolution and explore the variety of life on the planet with the Tree of Life. Launch now: Tree of Life
A new series from the BBC and The Open University explores just how astonishing the natural world can be. Read more: OU on the BBC: Life: About the series
Mike Gunton, Executive Producer of the BBC/OU series Life, sketches out the scale of what the team are attempting Read more: Life: The making of Life: And you thought Planet Earth was big...