Jason South, Fairfax
Researchers have recorded a record coral die-off on the Great Barrier Reef.
Raimund Franken/ullstein bild via Getty Images
First comes the heat, then coral bleaching, then death.
Scientists say we've got five years.
If the bizarre Hollywood blockbuster Sharknado stuck to scientific facts, it wouldn't be particularly exciting. Australian scientists accidentally recorded the closest thing to a sharknado when a Cate...