The British government says it's pulling out of plans to support an experimental power station that would trap the carbon dioxide being released by the power plant because of technical problems. The government had planned to invest more than $1bn into the carbon capture technology. Our science correspondent David Shukman has the details.

The idea is for power stations to burn coal or natural gas as usual but then to intercept the carbon dioxide that rises up the chimney, transport it by pipeline under the North Sea and store it in old oil fields. But one by one, different initiatives have collapsed. Another last and most advanced of these at Longannet in Fife has bitten the dust as well. The power companies involved and environmentalists describe this as a very heavy blow.

Malicious computer software similar to the Stuxnet worm that infected Iranian computers last year has been discovered on the systems of several European companies. An analyst from Symantec, the firm that decoded Stuxnet, said the new malware contained most of the code found in Stuxnet. He said the new malware, dubbed Duqu, was a Trojan Horse designed to collect and relay back information about the host system.

A day after around 50 wild animals escaped from a private zoo in Ohio, police say they have killed nearly all of them, including grizzly bears, lions and tigers. At least two are still on the loose, including a monkey and a wolf. The authorities believe the owner of the zoo set the animals free and then shot himself. He'd recently been released after being jailed for firearms offences.