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Bitcoin has been tied to the dark side of the Internet, where it's been linked to drug trafficking. But New York's financial regulators say they want to foster innovation and are looking to legitimize the virtual currency by licensing it.

President Obama used to say that he wanted to rely more on career diplomats to serve as U.S. ambassadors. But he's been opting for political appointees who are big donors with limited international experience.

After four decades on Capitol Hill, the California Democrat plans to step down at the end of the year. He leaves a deep legacy in health and environmental law, including clean-air rules and tobacco restrictions.

One of the most famous childhood stars of all times, Shirley Temple Black has died. Remembered for her curls and acting talent, she became the face of hope during the Great Depression.

The world is at greater risk than ever from pandemics and biological weapons, health officials said Thursday. In response, the U.S. government is spearheading a global effort to build an early warning system for infectious diseases, drug-resistant microbes and possible bioterror agents.

James Clapper, the director of national intelligence, listed "insider threats," alongside cyber attacks and terrorism. This marks the first time unauthorized disclosures are given such prominence in a threat assessment report.

At the Vancouver games, Canada won the most gold medals. Now fans are cheering on their teams in Russia: A moving, yelling, living, breathing mass of Canadian pride.

Do pushy parents make a baby fatter, or is it all in the genes? That's one of the big puzzles that scientists are trying to answer. Two studies suggest that an individual's interest in food is a big factor, even in babies. A genetic predisposition may be involved.

Talks in Vienna about Iran's nuclear program kick off what could be a year of negotiations. Negotiators are seeking a deal to follow the temporary agreement now limiting Iran's nuclear program.

One year ago, Lauryn Williams had never tried bobsled racing at all; she was only elevated to the elite U.S. women's team 11 days ago. Wednesday, she made Olympic history.