Online cognitive exercises -- or brain training -- are finding a particularly receptive audience these days. I've tried two of them, and found both to be engaging.

To establish a sustainable settlement on Earth's solar system neighbor, space travelers will have to learn how to grow food on Mars, experts say.

Earth's global thaw has reached Mount Everest, the world's tallest peak, researchers said Tuesday at the Meeting of the Americas in Cancun, Mexico.

Google CEO Larry Page is finally disclosing the health problem that spooked investors last summer when he mysteriously lost his voice.

The Ministry of Tourism and Culture expressed outrage at the demolition of the Nohmul complex in northern Belize to extract crushed rock for a road project.

Advancements in science have made it possible to bring animals back from the dead, but one scientist recently argued that it might not be morally right to do so.

Research In Motion unveiled a lower-cost BlackBerry aimed at consumers in emerging markets on Tuesday, and said it will offer its once-popular BlackBerry Messenger service on iPhones and devices running Google's Android software.

A planned Windows 8 update to address complaints and confusion with Microsoft's new operating system will be made available for free this year, the company said Tuesday.

A loophole in Einstein's general theory of relativity could allow a ship to traverse vast distances in less time than it would take light. The trick? It's not the starship that's moving — it's the space around it.

For wasting your productivity, nothing beats a good Google Doodle or easter egg -- especially the ones that make us smile and teach us at the same time. Here are 12 of our favorites, from video games to interactive melody makers and more.

 There seems to be no end to what Google Glass can do. The latest advancement to come to Google's futuristic headgear is an app that gives Glass facial recognition capabilities. 

Scientists monitoring Alaska's volcanoes have been forced to limit real-time tracking of eruptions amid ongoing federal budget cuts -- moves that could mean delays in getting vital information to airline pilots and emergency planners.

The sun, it seems, is in overdrive. Late Monday night, the sun unleashed its third major solar flare in 24 hours — the biggest and most powerful solar storm of the year, so far.

Formerly known as Project Shield, nVidia's portable gaming gadget will sell for a relatively steep $349 via retailers such as GameStop, Micro Center and Canada Computers. 

At a press event in London on Tuesday, Nokia is showing off the Lumia 925, a new variant of its flagship Windows Phone.

Canadian astronaut Chris Hadfield, American Thomas Marshburn, and Russian Roman Romanenko landed as planned southeast of the town of Dzhezkazgan 

 A construction company has essentially destroyed one of Belize's largest Mayan pyramids with backhoes and bulldozers to extract rock for a road-building project.

Eruptions on the sun's surface can blast tons of plasma into space -- sometimes right at the Earth. Astonishing pictures show the giant flares and clouds of ionized gas erupting from the star.

Archaeologists have uncovered an "extraordinary" mosaic that would've been used as the floor of a public building during the Byzantine Period in what is today Israel, the Israel Antiquities Authority (IAA) announced.