Scientists discover potential way to make graphene superconducting

Scientists at the Department of Energy's SLAC National Accelerator Laboratory and Stanford University have discovered a potential way to make graphene – a single layer of carbon atoms with great promise for future electronics – superconducting, a state in which it would carry electricity with 100 percent efficiency.

Barnes & Noble credit card data was stolen

Barnes & Noble is playing damage control after a large amount of credit card data appears to have been stolen from dozens of storms.

Twitter redesigns to take on Facebook

Twitter's had a major redesign, aimed at making it faster, easier to navigate - and more attractive to advertisers.

Isis mobile payments venture signs major credit card deal

Isis - the mobile payments joint venture from AT&T, Verizon and T-Mobile - has signed up four credit card companies, potentially pushing it ahead in the race with Google Wallet.

Discovery launch may be postponed to next year

The last flight for space shuttle Discovery is looking increasingly likely to be pushed back to next year, as engineers battle to carry out a series of repairs.