Michigan and the Great Lakes are bracing for another cold shot later month as a polar vortex split in the stratosphere nudges ...

A vortex tube splits a stream of air into hot and cold! This is how it works and why it doesn't violate the second law of thermodynamics.

It’s a pattern responsible for holding back the coldest temperatures on the planet. The lowest readings ever recorded in Canada and around the northern hemisphere occurred when this Arctic feature ...

Add Yahoo as a preferred source to see more of our stories on Google. The polar vortex is sending arctic blasts and chilly temperatures to most of the United States, and states from Texas to Oklahoma ...

High above the North Pole, in a slice of atmosphere rarely noticed and even less understood, a transformation is underway. Over the next 10 days, changes in the stratosphere will upend weather ...

A January thaw that brought widespread record warmth to the United States is coming to an end. It will be replaced by the familiar polar vortex pattern that caused below-average temperatures in the ...

The polar vortex is stirring up, bringing the earliest hints that the seasons are changing. That shift is most noticeable in northern Wisconsin, where a frost advisory was in effect early Monday, Sept ...

It’s really, really cold again — as the US shivers through at least the eighth blast of air from the Arctic this winter. Winter, which is warming faster than any other season for much of the US, seems ...

Maddy has a degree in biochemistry from the University of York and specializes in reporting on health, medicine, and genetics. Maddy has a degree in biochemistry from the University of York and ...

Gov. Tony Evers of Wisconsin declared an emergency and told the National Guard to be ready to help. The University of Notre Dame announced it was closing its northern Indiana campus from Tuesday ...

The polar vortex is sending arctic blasts and chilly temperatures to most of the United States, and states from Texas to Oklahoma could see snow, sleet and ice. As of Wednesday, Jan. 21, millions of ...