Nasa's ageing Opportunity rover on Mars continues to make significant discoveries with the observation of a rock rich in clay minerals - an indicator of ancient water activity.

A committee of MPs reject a £25bn scheme to generate electricity from a barrage across the Severn.

Some of the world's rarest big cat species are facing a potentially deadly threat from a virus carried by domestic dogs, an expert warns.

The Technology, Entertainment and Design conference opens in Edinburgh this week with suitable off-the-wall technology.

The International Energy Agency offers short-term solutions to keep climate change below a "danger threshold".