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 is playing damage control after a large amount of credit card data appears to have been stolen from dozens of storms.
Twitter's had a major redesign, aimed at making it faster, easier to navigate - and more attractive to advertisers.
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.
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.