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As an acoustic engineer, Trevor Cox has spent most of his career getting rid of bizarre, unwanted sounds. But in The Sound Book, Cox turns up the volume on those sonic oddities. The book explores weird echoes and unexpected noises from around the globe — including "whisper galleries" and a chirping pyramid.

The two teams will meet Wednesday in an early round game, but they have an intense rivalry that has often turned to heated clashes on the ice. The players are neither embarrassed nor proud of the fighting, but, yes, it could happen again.

Air bags stored in backpacks are saving the lives of backcountry skiers, snowboarders and snowmobilers. They look something like car air bags, but they work on an entirely different principle. These keep you safe simply by turning you into a larger object, and that helps you rise to the top of debris.

Governments, schools and companies keep track of your race. The statistics are used to track the proportion of blacks and whites who graduate from school. They tell us how many people identify themselves as Native American or Asian. They help us measure health disparities. But there's a problem with all those statistics — and the deeper way we think about race.

NBC says its coverage of the Winter Olympics has drawn more than 100 million viewers over its first weekend. That indicates lots of interest in the games, which will fill 1,539 hours of coverage across NBC's broadcast network, cable channels and online. We have some suggestions for watching the Sochi Olympics — from the regular network broadcast to cable to the Internet.

Energy drinks tend to get a bad rap. But when it comes to caffeine intake, teenagers seem to be getting far more caffeine from coffee drinks. Overall, about three-fourths of children in the U.S. consume caffeine on a given day.

The National Weather Service is using strong language to warn people in Atlanta and places nearby that dangerous weather is on the way. President Obama has declared an emergency in the state of Georgia, ordering federal agencies to help local efforts.

In the midst of increased connectivity, are we becoming more disconnected from one another — and ourselves?

It won't be as powerful as the strike against SOPA and PIPA in 2012, when Wikipedia blocked its site, Google blacked out its logo and millions of people joined in. But "The Day We Fight Back" on Tuesday is intended to show lawmakers that there's ongoing public pressure to reform mass surveillance laws.

The decision means Congress will likely avoid another dramatic — and potentially costly — confrontation over extending the country's borrowing limit.