Stretching a full 2000 kilometers 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 programs 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...
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