Meteorologists said the eastern two-thirds of the nation is threatened with a winter storm that could rival the damage of a ...

As the U.S. prepares to take on another bout of cold weather, the term "polar vortex" is getting thrown around. But what is ...

A four-year record from the heart of the Ross Ice Shelf shows how subtle changes could shape future sea level rise, ocean ...

The big winter (and popular) topic is dusted off very early this season as frigid air plunges south next weekend. But what is ...