Politicians in 32 major economies are passing laws that reduce greenhouse gas emissions despite the deadlock in UN climate negotiations, says report.

The power of tidal currents around the UK’s coastline could provide more than 20% of the nation’s electricity needs, a report suggests.

US doctors develop a pill-sized device that can take detailed microscopic images of inside the gullet, the passage which links the mouth to the stomach.

The US Department of Energy is giving $120m (£75m) to set up a new research centre charged with developing new methods of rare earths production.

The White House rejects a petition calling for the building of a Death Star, a huge battle-station similar to that seen in the Star Wars films.

Our understanding of the anatomy of some of the first four-legged animals is wrong, a study reports.

High levels of pollution in northern China and the capital, Beijing, in recent days prompt calls for government action in state and social media.

An audit uncovers waste in EU-funded energy efficiency projects, saying they need better monitoring.