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The price of copper is down 40 percent from four years ago. Arizona residents from smaller mining towns worry about job losses, but some companies are planning to expand in the state.

A few years ago, Nicaragua was almost totally dependent on imported fuel. Now the country's fierce winds, sun and volcanoes generate nearly half the country's electricity, and perhaps 80 percent soon.

Chad, Niger and others began an offensive against extremist fighters in Nigeria. Renee Montagne talks to Comfort Ero, African program director for the International Crisis Group, about the offensive.

The men were in a video of Sigma Alpha Epsilon members singing a racist chant. They have apologized, with one of the now-former fraternity brothers saying he had learned "a devastating lesson."

Police say two armored trucks carrying jewels and other items worth some $9.5 million were seized by heavily armed attackers on the highway between Paris and Lyon.

Officials and witnesses say an Iraqi force now controls part of northern Tikrit, the city that was taken last June by the self-proclaimed Islamic State.

Cumin has been popular since the dawn of written history: It's the only English word that can be traced directly back to Sumerian. Since then it has insinuated itself into cuisines around the world.

Though it never panned out, the sugar industry backed research to develop a vaccine to fight tooth decay, old industry documents reveal. Researchers say the goal was to deflect efforts to limit sugar.

The new mobile app for live video streaming piggybacks off Twitter and is easy to use. Meerkat comes at a time when video is increasingly popular. But can the hype last?

Dozens of gold and silver coins, some from the eras of Alexander the Great and Julius Caesar, spent decades on a shelf in the University at Buffalo's library.