A major tidal energy project is to be built in the Sound of Islay off the west coast of Scotland.

Monkeys learn with age to recognise photographs of their friends, according to scientists.

Nasa's Messenger spacecraft is primed and ready to enter into orbit around Mercury on Friday - the first probe to do so.

China suspends approval for new nuclear power stations following the accident at Japan's Fukushima Daiichi plant.

Japan is stepping up efforts to cool overheating fuel at the tsunami-hit Fukushima Daiichi nuclear plant, as helicopters dump tonnes of sea water.

German Chancellor Angela Merkel announces a "measured exit" from nuclear power in response to the Japanese crisis.

Concern grows about the prospects for Fukushima, with fears of a partial meltdown raised anew.

China is planning to develop a version of the Eden Project, the BBC learns.