World's largest marine park to be created off the coast of Hawaii

President Barack Obama, pictured here while hiking the Exit Glacier in Seward, Alaska, is looking to sure up his ...

President Barack Obama is set to vastly expand a marine sanctuary northwest of the main Hawaiian Islands, White House officials said Thursday, creating the world's largest protected marine area as he seeks to cement his environmental legacy in his last months in office.

The world's most mysterious mammal

No scientist in history has ever seen Zenkerella alive.

Scientist David Fernandez peered at the odd-looking critter,and hoped it was the real thing. He'd never seen one of these animals in its entirety before. No scientist ever had.

Fish pretend it's night to tackle hot seas

The spiny damselfish produces offspring with flexible body clocks that help adapt to ocean acidification.

Some fish may cope with the changing chemistry of the oceans linked to global warming by permanently setting their body defences to night-time levels, the time of day when they find seawater least hospitable, a study says.

How we have again put koalas at risk

Biggest threat to koala populations is loss of habitat, scientists say.

NSW is where scientists are especially worried, with proposed changes "likely to greatly increase the amount of deforestation and loss of habitat".