Company says rebrand is designed to ensure logo works across 'different screens and experiences'
Once the hot start-up, is it now the next MySpace? On Twitter's ninth anniversary, many analysts are questioning its future
Police confirm the cause of 13-year-old's death was hanging and it is not being treated as suspicious
Social network rolls out 'legacy contacts' to allow people to pass on their Facebook page after they die
Lutz Bachmann, leader of the German far-right organisation, dismissed the photo as 'just a joke'
Torben Aakjaer made anti-immigration comments on the social media site, prompting internal United inquiry
Human rights groups say Soheil Arabi's execution is 'imminent' and appeals to a Tehran court for amnesty
MPs criticise 'legalese' terms and conditions and say social media companies should reform how they collect and use data
Founder of Facebook apologises to audience for his 'terrible Chinese' before holding full Q&A in Mandarin
Fast-growing new site Ello promises 'beauty, simplicity and transparency' – and no advertising
Your privacy is 'guaranteed' – but would you pay $9000 to talk to people about fine wines and classic cars?
From Facebook to the FBI, facial recognition software is everywhere – but is it a 'critical threat' to our privacy?
Social bonding or rampant narcissism? Academics argue over the cultural significance of 'usies'
OkCupid dating site admits to removing people's photos and lying about how well matched they are
Popular chatting app urges users to request their Facebook friends to join up, prompting outcry
Facebook pages set up in the names of flight MH17 victims link to porn sites and malware
Confusion over military involvement, but the American military is already studying you
Longest Facebook blackout 'in recent history' sends users flooding onto Twitter
Top official reveals secret government policy justifying mass surveillance of social media users
Instagram has strict rules on nudity – but not all social media sites are so puritanical