Stretching a full 2000 kilometres in length and made up of 3000 individual reef systems and hundreds of islands, Australia's Great Barrier Reef is breathtakingly beautiful. Selected as a World Heritage Site in 1981, it is one of the wonders of the natural world. These programmes offer a definitive guide to the secrets of the reef - how it was created, how it works, the intricate relationships between its inhabitants and how climate change and other factors might shape its future. Using the latest specialist filming and visual techniques, the series captures the magic of the reef as it has never been seen before.