The social implications of teens leaving Facebook

For years, Facebook grew in size and influence at a staggering rate. But recent reports suggest its hold on users —particularly in the developed world —may be weakening.

Facebook membership hits 500 million mark

The number of people using Facebook hit the 500 million mark on Wednesday, meaning one in every 14 people on the planet has now signed up to the online social-networking service.

China's biggest microblog tops 200 million users

A popular social networking service used by Chinese people to vent their anger over a deadly July train crash now has more than 200 million users, owner Sina.com said Thursday.

US 'concerned' by new Vietnam social media curbs

The United States on Tuesday said it was "deeply concerned" over a sweeping new Internet law in Vietnam which bans bloggers and social media users from sharing news stories online.

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