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We profiled women who were on the front lines of social change this year — from a doctor fighting Ebola in Congo amid gunfire to two forthright beauty queens.

New research surveys available data to find what makes people happy around the world.

A combination of economics and climate change fixes may soon doom Denver's historic steam system.

A conversation with bestselling writer Walter Mosley about his hard-boiled character Easy Rawlins and a life in crime writing.

The island of Metlakatla in southeast Alaska is a temperate rainforest but it's struggling to deal with unusually dry conditions.

Former mayor of Memphis, A. C. Wharton, talks to us about the year's events, both personal and political.

Willis, 72, also worked with Earth, Wind & Fire. She says she learned from the band's Maurice White to "never let the lyric get in the way of the groove."

The number of tourists arriving in Greenland has soared over the past few years. That's creating opportunities on the sparsely populated island, including for tourist guides.

Several tech experts weigh in on the technologies of the past decade that had the greatest impact on society.

Biochar is made from natural materials such as straw and shells, and it can sequester carbon.