More attempts are made by the European Space Agency (Esa) to contact the stricken Russian probe Phobos-Grunt - with partial success.

Scientists have used brain scans to shed more light on how the brain deals with the memory of unpleasant or traumatic events during sleep.

US drugs firm Merck & Co agrees to pay almost $1bn to settle charges arising from the marketing of one of its drugs, Vioxx, the US Department of Justice says.

Bottlenose dolphins' maximum swimming speed is almost halved by pregnancy, making mothers-to-be much more vulnerable to predators, scientists find.

UK Climate Secretary Chris Huhne says the world needs a deal that "bites" on emissions within a decade, with richer developing countries pledging more.