This striking astronaut photo shows a unique chain of three atolls lined up side-by-side off the coast of Australia. The oval islands were once part of a colossal coral system that rivaled the Great ...

Explore the breathtaking Great Barrier Reef, the world's largest coral reef system, stretching along Australia's northeastern coast. This stunning drone footage captures the vibrant coral ...

The reef is home to thousands of species, including sharks, turtles and whales. Australia relies on it for about 70,000 jobs and billions of dollars annually in tourism revenue, all now threatened ...