Corals on Great Barrier Reef will never be the same after back-to-back heat waves, scientists say
(LA Times Dodgers)

The Great Barrier Reef suffered a catastrophic die-off after two back-to-back marine heat waves in 2016 and 2017, a new study finds - and many of its reef communities have been fundamentally changed. The grim discovery, described in the journal Nature, reveals just how vulnerable many coral species...