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Liu Cixin's science-packed, futuristic best-sellers explore the cosmos and offer commentary on current events. The first book in his trilogy has been translated into English.

If you're wondering how to get more people to contribute to your online charity drive, consider a photo of you smiling. Even better if you're an attractive woman. Biology is to blame, researchers say.

As the 51-year-old civil war in Colombia winds down, efforts to find and destroy the many mines are underway.

A drug being tested against Ebola makes use of new scientific insights that could prove useful for treating other illnesses, including one that is inherited.

Videotaped murders by Islamic State have sparked outrage around the world. But while some European countries have paid ransom to retrieve victims taken by ISIS, Britain and the U.S. have not.

The newly elected leadership in Greece is against budget cuts imposed by the European economic zone in return for bailing it out. Renee Montagne talks to Tom Nuttall of The Economist.

The dollar's value keeps climbing. That's a sign of a healthy economy, especially compared with some of America's biggest trading partners — but it also has the potential to slow U.S. economic growth.

The department is investigating whether U.S. airlines worked together to keep ticket prices high. Prosecutors want to know if they held back competition by limiting flights and seating capacity.

First-time investors were the hardest hit by China's stock market crash. Many who rushed to invest didn't have a high school education. NPR's Wade Goodwyn talks to economist Tom Orlik of Bloomberg.

Wisconsin Gov. Scott Walker enters an already crowd field of Republicans vying to become their party's presidential nominee. What is the case he's making to voters?