For Dr Heron, the increasing frequency of marine heatwaves on the Great Barrier Reef is a pressing issue. 2016 was part of the third, and longest, mass coral bleaching event so far recorded.
Heron Island is a coral cay in the midst of the largest single structure created by living organisms in the world - the Great Barrier Reef. Heron Island, Australia Here, Liz Bonnin is witnessing ...