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Hardly anyone roasts American chestnuts over an open fire anymore: A blight all but wiped out the trees they grow on. Now the discovery of a soaring survivor could aid efforts to breed a hardier tree.

Fuel economy is at record highs and carmakers have surpassed strict greenhouse gas emissions standards for the third straight year, the Environmental Protection Agency says.

Alaska is about to become the first state to have pot cafes where people can buy and consume marijuana. The state's marijuana control board recently approved on-site consumption at retail stores.

Live telecasts of other musicals have gotten attention mostly for the hatred they inspired. But The Wiz Live! — back for an encore Saturday night — seems to have broken that spell.

In response to a lawsuit, New York has offered to limit its use of solitary confinement, including prohibiting its use for prisoners under 18. This may be a potential watershed in prison policy.

President Vladimir Putin isn't the first Russian leader to try to rebuild Sochi, but it's not so clear his project will ultimately be more successful than his predecessors.

Powerful cartel leader Joaquin "El Chapo" Guzman was charged Monday with violating drug trafficking laws. He was a vicious killer. But many see him as a hero who helped the poor and maintained order.

Russia has implied that it may act as a spoiler in the Iran nuclear talks in retaliation for Washington-imposed sanctions over events in Ukraine. Correspondent Peter Kenyon joins Scott Simon.

The focus remains on an area of the Indian Ocean southwest of Perth, Australia. Teams are looking for objects seen floating in the ocean there in images taken by a satellite last weekend.

Invasive weeds are already a big headache for ranchers, who spend thousands of dollars to get rid of them. New research shows that a changing climate is likely to help many of these weeds thrive.