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After a scientist on a hike in Sequoia National Park saw trees with thin and browning needles, it got scientists thinking: Did the drought cause this? So they're climbing up them to study the damage.

A few dozen moderate rebels were recently sent into northern Syria. But before they could go on their first mission, several were captured. It's the latest sign of trouble with the program.

On the Democratic side of the presidential race, presumed frontrunner Hillary Clinton is running into some headwinds. Reports say Vice President Joe Biden is considering getting into the race.

Puerto Rico's default on Monday raises pressure on Washington to step in with help and opens a new chapter in Puerto Rico's relationship with its lenders — one now expected to move to the courts.

Even before he officially unveiled it, President Obama's plan to cut the carbon pollution produced by power plants faced significant opposition.

The Securities and Exchange Commission voted Wednesday on new rules that require public companies to list their chief executives' total annual compensation as a ratio to their workers' median pay.

Scouting has been the official program for Mormon boys for more than 100 years, but that may change after a vote allowing openly gay leaders. A Brigham Young professor says a split would be wrenching.

If the president's Clean Power Plan survives legal and political challenges, the nation's electricity industry will have 15 years to remake itself and reduce CO2 emissions by a hefty margin.

NPR's Melissa Block speaks with Mark Ghilarducci with the state emergency services office about the wildfires tearing across California.

The ability to store energy could revolutionize the way electricity is made and used. But for many utility companies and regular folks, energy storage is still too costly and difficult.