How, exactly, do things go viral on Twitter? It's a question that thousands of self-styled social media mavens, gurus and ninjas claim to have the answer to, but Twitter itself should be much better placed
So many Japanese are falling off rail platforms or bumping into things while staring at smartphones that it's sparked safety campaigns, it seems. The trend has even acquired a name "Aruki Sumaho" - or
Supporters of Egypt's deposed president have dug in at their two Cairo sit-ins after security officials said police would besiege the protest camps within 24 hours - perhaps as early as Monday morning.