Nature & Environment
How bad are things at the Great Barrier Reef?
...climate change to the world’s coral reefs. Heat stress from record high summer temperatures damages the microscopic algae (zooxanthellae) that live in the tissues of corals, turning them white. After they bleach, these stressed corals either slowly regain their zooxanthellae and colour as temperatures cool off, or else they die. The Great Barrier Reef bleached severely...