Police departments are starting to equip officers with video cameras on their uniforms. It's supposed to protect both cops and the public, and clarify he-said-she-said situations. But the technology is raising a number of questions and concerns about access and privacy.

Demographers divide generations by birth year. But each group has also been shaped by the news, music and major cultural events of its era. So what really distinguishes a baby boomer from a Generation Xer, a millennial from a member of the silent generation? Share your defining moments.

Groupon's stock is hot, but after a string of successful initial public offerings in the tech sector some analysts worry about overvaluations.

A year ago, the existence of Stuxnet, the world's first cyber superweapon, first emerged. Many experts suspect the U.S. government had at least a hand in its creation. The development and use of offensive cyberweapons may create challenges for a nation's cyberdefenders — and could be a big policy issue in the nascent era of cyberwarfare.

India has unveiled what it says is the world's least expensive tablet computer, along with a promise to make the device available to the country's college students. Critics say it's a gimmick to avoid addressing the real problem: that India's education system is a mess.

The Stuxnet computer worm successfully damaged centrifuges at a nuclear facility in Iran. Now, officials responsible for defending U.S. infrastructure fear that Stuxnet may have provided a blueprint for adversaries who may want to sabotage industrial operations in this country.

Electromagnetic field detectors measure signals from faulty wiring and radio waves — but some paranormal investigators say they can also sense spirits. Temperature guns to track cold air in haunted sites are another key component in a ghost-hunter's toolkit. Scientific sense can be made of it all.