A study finds unchecked climate change could destabilise Antarctica's huge Totten Glacier in the coming centuries, pushing up global oceans by 2m, or more.

A leaked New Zealand government memo casts serious doubts on the sustainability of fish that are widely used in McDonald's restaurants.

Scientists suggest that at least two huge tsunamis once swept across the Red Planet, triggered by large impacts.

Bayer is offering to buy agricultural giant Monsanto in a deal that could create the world's biggest supplier of seeds and pesticides.