AAP: Vast swathes of mangroves have died in Australia's north, with scientists saying climate change is likely responsible for the staggering scale of the event. Once healthy mangroves that lined the Gulf of Carpentaria's coastline are now dead, and the die-off happened over a single month, James Cook University Professor Norm Duke says. He says the scale of the event is a world first and coincided with a mass coral bleaching event on the Great Barrier Reef. About 7000 hectares have been affected along...