AT&T chairman Robert Allen underwent heart surgery at the weekend, to replace a constricted valve. The company said Allen was comfortable, and that he would be back at work by the end of February. Day to day business is being handled by president John Walter in his absence.
Geoengineering on the sea floor near glaciers would form a new ice shelf to prevent melting
Alterations in capillary blood flow can be caused by body position change
Curiosity rover is in 'normal mode' but not transmitting scientific data back to base
NatWest outage comes a day after Barclays' IT systems shut out customers and staff