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As the Winter Olympics in Sochi approach, Russian officials are freeing some high-profile prisoners. Critics of Russian President Vladimir Putin say he's just trying to burnish his nation's reputation.

Economists caution against reading too much into the latest economic data. During the holidays, offices that collect the information aren't always open and that can delay some of their work.

Few people have homes where smart appliances talk to each other. A group of companies hopes to develop a "common language" of software to change that. And the firms hope an open standard will address potential security and privacy issues that are bound to arise.

This year was on track for a record-low number of polio cases. But polio pushed back hard. It reappeared in some places and spiked in others. Still, global health officials remain confident that polio can be defeated soon.

The young ruler of North Korea stunned the world when he ordered his uncle executed. Now, observers are reading the tea leaves for a sign of what's to come.

Meanwhile talks with the European Union over a trade deal seemed to sour further. An EU official said Ukraine's "arguments have no grounds in reality."

Many soaps and other consumer products have chemicals that are advertised as antibacterial. But there's no evidence that they actually keep people from getting sick, the FDA says. And they may increase the threat of bacteria that are resistant to antibiotics.

Every brake screech, whistle and rattle from the movie The Polar Express came from recordings of a historic locomotive, the Pere Marquette 1225. After four years of costly repairs, passengers can once again jump onboard and travel to see Santa Claus at the North Pole (imagination required).

Dr. Tim Ihrig has almost become a member of the Avelleyra family. He's helping Augie and Phyllis, who've been married 60 years, lead the best lives they can under trying health circumstances. When Phyllis was diagnosed with congestive heart failure, Ihrig asked what she wanted from the rest of her life.

A chronic brain disease afflicts former pro football players, boxers and others who suffer repeated brain injuries. Doctors now can only diagnose it with certainty after someone dies. But researchers are working on tests that could work while people are alive.