Almost two-thirds of sharks and rays living on the world’s coral reefs are at risk, with 14 of 134 species deemed critically endangered.

The rate of warming in the top two kilometres has doubled from levels in the 1960s, a review finds.

The cat-sized nocturnal marsupials, which are unique to Australia, live in areas from north Queensland to central Victoria.

Researchers estimate that carbon emissions from transporting food are about six per cent of the global total, with fruit and vegetables the largest contributor.

Prof. Terry Hughes says he believes bleaching is under way as the Australian government conducts monitoring flights over 2,300-kilometre reef.

In a taste of things to come, a secret Office of National Assessment report worried the "carbon dioxide problem" would hurt the nation’s coal industry.

Scientists at the Commonwealth Scientific and Industrial Research Organization found it was theoretically possible to turn back the clock on the effect of decades of fossil fuel burning, but the radical step came with “as yet unquantified risks.”

The disembodied head of the sacoglossan sea slug feasts on algae while its old body decomposes, and a new one grows.

Weaker sharks are less effective hunters, which can upset the balance of the ecosystem, say the authors of a study into the impacts of hotter oceans.

More than 450 long-finned pilot whales became stranded in harbour in Tasmania with rescuers managing to save about 50