South Korea's Samsung Electronics said it would start selling its newest smartphone in 28 countries from Tuesday as it seeks to cement its position as the world's top-selling mobile phone maker.

The Galaxy S3, unveiled in London earlier this month, will hit shelves Tuesday in nations including Britain, France and the United Arab Emirates, the firm said in a statement.

Online social networks, a newcomer in Mexican elections, are making a mark on the country's presidential campaign, forcing candidates to respond to issues and protests enabled by the Internet.

"If it wasn't for the social networks, the campaign would be really boring," said Roy Campos, head of the polling company Mitofsky.

The horrendous stock market debut for Facebook suggests investors are not ready to jump in and create another tech bubble despite big expectations for social media, analysts say.

Facebook closed out its first full week of trade with a loss of 16 percent from its offering price of $38, in a huge disappointment after a much-hyped initial public offering worth $16 billion, the biggest for a tech firm.

Yahoo! shuttered its fledgling digital newsstand for iPads on Friday in what it said was the start of a product purge intended to make the floundering Internet pioneer more nimble.

Livestand was launched in November as a way to turn tablet computers into personalized magazines rich with stories, images and video suited to individual tastes.

Australia on Saturday hailed a surprise decision giving it a role in a radio telescope project aimed at revolutionizing astronomy, vowing to draw on its decades of experience in space science.

Australia and South Africa were named joint winners of the Square Kilometer Array (SKA) project following a meeting of the organization’s members in the Netherlands on Friday.

Facebook's rocky initial public offering hasn't stopped life at the world's biggest online social network. On Thursday, the company unveiled a camera app for the iPhone.

The app can be downloaded from Apple's App Store and works like most other camera applications for smart phones. To take a photo, you tap a camera icon in the upper left corner of your screen, aim and shoot. You can then add filters, crop or tilt your photo, and share it on Facebook.

Zombies stalked San Francisco streets on Thursday as social game maker Zynga ghoulishly introduced a game that lets iPhone or iPod Touch users slash and hack the undead.

Actors posing as the living dead were unleashed here and in Manhattan ahead of the "Zombie Swipeout" launch. The hordes enticed humans with free "blood pops" -- hibiscus and mint popsicles promising the "fleshiest" ingredients.

The Swiss sun-powered aircraft Solar Impulse landed safely in Madrid early Friday at the end of the first leg of its attempt at an intercontinental flight without using a drop of fuel.

Pilot Andre Borschberg successfully had launched the plane from an airfield in Payerne in western Switzerland at around 8:30am (0630 GMT) Thursday, bound for Rabat via Madrid, after a two-hour delay due to foggy conditions.

Yahoo! on Wednesday set out to reclaim the Internet search crown from Google with the release of software that transforms the way users explore the Web using Apple's coveted gadgets.

A Yahoo! Axis application was introduced for iPhones, iPads, and iPod Touch devices and also as "plug-in" software for Chrome, Internet Explorer, Firefox and other Web browsers featuring HTML-5 graphics capabilities.

Google won a major victory Wednesday as jurors sided with the Internet giant in a high-stakes court battle over patents with business software titan Oracle.

In a unanimous decision, 10 jurors agreed that Oracle had failed to prove its claims that Google infringed on Java software patents in Android operating software for smartphones and tablet computers.