Last year at the International Coral Reef Symposium in Honolulu, many of the gathered researchers and scientists shared moments of mourning, some openly shedding tears. 

The Great Barrier Reef, and other coral systems around the world, were experiencing some of the worst coral bleaching ever recorded.

Now, a year later, the situation has grown even more dire. 2017 brought another wave of bleaching, and scientists fear some reefs, thanks to a rise in average ocean temperatures, will never recover.

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