To say that the Great Barrier Reef is the world's largest coral reef may be understating things; the Australian government notes that it is "the only living organic collective visible from Earth's ...

Stretching over 1,200 miles, Australia's Great Barrier Reef is the largest structure on Earth built by living organisms. Even for its size, it houses an incredible biodiversity -- literally ...

In 2016 and 2017, marine heat waves caused by climate change resulted in mass bleaching, which killed about half of the corals on the Great Barrier Reef, along with many others around the world.

Following is a transcript of the video. Narrator: This is the Great Barrier Reef, and it's dying. Less than 20 years ago, the world's largest living structure looked like this, and this.

One of the seven wonders of the natural world, the Great Barrier Reef lies in the clear blue waters off the northeast coast of Australia. Spanning 14 degrees of latitude, this complex reef system is ...