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The College Board announces a revamped SAT and a partnership with Khan Academy. CNET's Sumi Das talks to founder Sal Khan about how the online learning site hopes to improve college opportunities for students, and its work with the White House.

The College Board announces a revamped SAT and a partnership with Khan Academy. CNET's Sumi Das talks to founder Sal Khan about how the online learning site hopes to improve college opportunities for students, and its work with the White House.

Lose your hotel key card? Did it accidentally get demagnetized? Well, there's a new, high-tech way to get into your room: mobile keys that let guests unlock their doors with their cell phones. CNET's Kara Tsuboi reports.

Lose your hotel key card? Did it accidentally get demagnetized? Well, there's a new, high-tech way to get into your room: mobile keys that let guests unlock their doors with their cell phones. CNET's Kara Tsuboi reports.

This Sunday morning, our clocks spring forward one hour to mark the beginning of daylight saving time. While it might be nice for some to have more light at the end of the day, it can be tough for bodies to adjust to darker mornings. In this Tech Minute, CNET's Kara Tsuboi reports on some ways technology can help ease the transition.

Your smartphone's camera should do more than just snap shots of family and friends. Put it to work as a powerful tool to help you remember all sorts of useful information. CNET's Kara Tsuboi explains in this Tech Minute.

New Dolby technology called Atmos essentially puts the audience in a bubble of sound. CNET's Kara Tsuboi sits down with Stuart Bowling, Dolby's director of market development to hear how this new system was used to create the Oscar-nominated soundtracks in "The Hobbit: The Desolation of Smaug" and "Gravity."

Go behind the scenes of "The Hobbit: The Desolation of Smaug" with Christopher Boyes, the Oscar-nominated sound mixer on the film. Hear how he collaborated with filmmaker Peter Jackson and how he used Dolby Atmos sound technology to create a more menacing Smaug.

Dolby Atmos is used in the Oscar-nominated films "Gravity" and "The Hobbit: Desolation of Smaug." CNET's Kara Tsuboi goes behind the scenes at Dolby Labs with Academy Award-winning sound mixer Christopher Boyes.

The Google Maps team collect 360-degree Street View imagery from Churchill, Manitoba, home of one of the world's largest polar bear populations. In a video provided by Google, you can see the specially designed Tundra Buggy as it comes across the bears.

Last week, Facebook purchased WhatsApp for $19 billion. Not familiar with the mobile-messaging app? CNET's Kara Tsuboi brings you up to date on WhatsApp, which boasts 450 million users around the world, and other apps for free texting in this Tech Minute.

Samsung launches a new fitness band at Mobile World Congress in Barcelona, Spain. The new device offers users a heart rate tracker and pedometer functionality, and connects to the company's S Health app to manage overall fitness.

Samsung's latest smartphone, the Galaxy S5, tries to one-up the iPhone with biometrics that go beyond just a fingerprint scanner. Samsung also revamps its smartwatch offerings and jumps into the fitness tracker frenzy. CNET's Kara Tsuboi shows us how the company plans to beat Apple and other competitors.

At MWC in Barcelona, Spain, Samsung announces its second-generation Gear 2 smartwatch. The new device features the company's home-brewed Tizen OS, an integrated heart rate monitor, and water- and dust-resistant tech.

At MWC in Barcelona, Spain, Samsung shows off the new features of its Galaxy S5 smartphone, including a new power-saving mode, fingerprint reader, and water- and dust-resistant technology.