TechnologyBack to black: The enduring quest to portray nothing A painting of a black square shown in Russia 100 years ago broke new ground, now revisited by an exhibition in London and a carbon nanotube take on the original CultureLab
TechnologyFBI says North Korea hacked Sony – what's the proof? The FBI says North Korea forced Sony to cancel the release of Seth Rogan's film The Interview. But security experts are sceptical 51¶¯Âþ