Protect this jewel in the Indian Ocean's crown

Coral reefs, the colourful rainforests of the ocean and home to a quarter of fish in the sea, seem doomed. Yet in the remote heart of the Indian Ocean lies a tiny group of islands that chance and biology have conspired to preserve in pristine, primal condition. They are as biologically significant as the Galápagos Islands or the Great Barrier Reef, bathed in seawater thought to be purer than any on the planet. The Chagos Islands offer a glimmer of hope for an ocean choking from man's impact. Best...