Fact-checking news organisations have sprung up on every continent, gaining attention in places ranging from Egypt to South Africa, Chile and France.
A satellite firm that invited the public to find a plane that went missing in early March now has three-million people participating in the programme.
Microsoft and Google have become embroiled in a bitter dispute over who is the fairest of them all for online shopping.
The 2012 US presidential election campaign is being fought with tweets, hashtags, Facebook updates and emails in a battle for digital supremacy.
Apple's victory in a landmark US patent case against Samsung could reshape the mobile sector and slow the momentum of Google and its Android system.
The public knowledge website is more than a decade old and remains among the top 10 Internet sites in the world, but some say it is becoming dowdy.
The US is seeing a natural gas boom thanks to discoveries of abundant shale gas, and at the same time a groundswell of opposition from critics.
Citigroup unveiled plans on Monday to repay $20-billion in government aid and outlined a plan to emerge from a massive bailout.
The recession in the United States "is very likely over" but its economy remains weak, Federal Reserve chairperson Ben Bernanke says.
A summit seeking a new economic agenda for the US kicks off on Monday, with debate among leaders aiming to find ways to maintain leadership.