The UK-born astronaut Piers Sellers accepts a commemorative pin to mark his achievements in orbit, and reveals he will return to work on climate science with Nasa.

A species of fork-marked lemur believed to be new to science has been found in the forests of Madagascar.

A spectacular meteor display is expected overnight at the UK's first Dark Sky Park in south west Scotland.

Cameras to detect lightning on Earth are to be placed high up in space by the US and Europe this decade.

Chinese archaeologists discover what they believe is a 2,400-year-old pot of soup, during airport extension work in the city of Xian, state media report.