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With U.S. troops on heightened alert and NATO forces on standby, fears of a Russian invasion of Ukraine remain. But even if Putin doesn't send troops in, he could still launch a crippling cyberattack.

Russian airlines are primarily only flying domestically. More than half of Russian planes are leased from companies in the West, which now must terminate those contacts and repossess the planes.

Four of the five Republican candidates for Montana’s western U.S. House seat squared off Tuesday in a primary election debate in Kalispell.

Canada's Boreal Forest is the source of billions of birds that fly south and end up at American birdfeeders. Wide areas of one of the world's largest remaining forests are being carved up for logging and oil wells, and bird populations are being affected. NPR's Elizabeth Arnold takes an NPR/National Geographic Radio Expedition to the Boreal Forest.

Israeli commanders say it could take weeks or even months to eliminate the threat from Hezbollah's rockets, and they acknowledge that the Shiite militia will never be defeated. Civilians in northern Israel, meanwhile, are growing desperate under the Hezbollah barrage.

A data center in DeKalb, Illinois, is the testing ground for a new sustainable concrete. Is this greenwashing or can new mixtures contribute to reducing the construction industry's carbon footprint?

Plenty of computers know thousands of words and complex rules of grammar. But they're dismal communicators. So a group of scientists at MIT is trying a different approach: They're creating robots that learn what words mean the same way humans do.

New U.S. legislation will force companies to prove that goods imported from the Chinese region Xinjiang are not made with forced labor. Experts say proving this is nearly impossible.

Leaders of the G-7 nations met in Germany and focused on the war in Ukraine. They talked about new missile defense systems for Kyiv and a proposal for a price cap for Russian oil.

As Emory oak trees in parts of Arizona disappear, members of several Apache tribes are working on a collaborative plan with the U.S. Forest Service and researchers to preserve them.