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The Leap Motion Controller senses and tracks hand motions to allow users to browse the Web, play games and open documents. It represents another step in a goal of computer scientists: to make interactions with machines feel natural and easy, and to take away the barriers between humans and computers.

Kenichi Togawa was working at the Fukushima Dai-ichi nuclear power plant in Japan the day the earthquake and tsunami struck. His family is still living in temporary housing. For many people, the stress and isolation brought on by the disaster could pose more persistent hazards than the radiation.

An Indiana woman wanted to honor her late husband with a headstone shaped like a couch, and featuring Indianapolis Colts and NASCAR logos. St. Joseph's Catholic Church said the headstone is completely inappropriate — so the widow sued.

Experts worry that while the North has often made threats, now it's rhetoric is ratcheting up. That may make the new young leader, Kim Jong Un, feel as if he has to follow through on the threats in some way.

The U.S. has objected to the 1,000-mile-long pipeline, but Pakistan says it's needed to alleviate its energy shortfall.

Why do people in Boston get the flu when it's cold, while people in Senegal get sick when it's hot? Humidity is a big part of the explanation. But how flu spreads in the tropics and more temperate climates appears to be different.

Islamist fighters have been playing a larger role in the Syrian conflict, and the most prominent single group is Jabhat al-Nusra. One of its fighters sat down with NPR and spoke about the group.

Comedy writer Emily Spivey could watch the comedy 9 to 5 a million times. "It really showed me that women are just as hysterical and funny as men," she says.

Preparations at the site of Tuesday's papal conclave include a high-tech scrubbing of the chapel for bugs and electronic monitoring equipment. Wi-Fi will be blocked throughout Vatican City, and cardinals with Twitter and Facebook accounts have been warned.

The allegations come as Defense Secretary Chuck Hagel continues his first visit to the nation as Pentagon Chief – and after a deadly explosion in Kabul on Saturday that the Taliban called a message to the new defense secretary.