This story has been edited to correct an error. Judah Cohen is affiliated with the Massachusetts Institute of Technology. Our old wintertime friend the polar vortex ...

The majority of the United States will experience chilling temperatures due to a blast of arctic air from Canada. The Midwest, Mid-Atlantic and Southern U.S. are expected to see below-freezing ...

Don't be fooled by the string of uneventful weather — the polar vortex is rebooting and will take another swing, or several, at the greater Philadelphia region, leading to a turbulent weather pattern ...

Our old wintertime friend the polar vortex is set to funnel bitterly cold air south from Canada two more times in January, once over this last weekend and again about a week later. “This first shot of ...

Warm Arctic waters and cold continental land are combining to stretch the dreaded polar vortex in a way that will send much of the United States a devastating dose of winter weather later this week ...

Bundle up! Coldest air in a decade as a weakening polar vortex brings plummeting temperatures to Ontario. The polar vortex, containing some of the globe's coldest air, is descending into Ontario.

This calm yet intense moment shows a European adder resting quietly in its natural habitat. A rare close-up encounter that reveals how well these snakes blend into their surroundings when undisturbed.

European Union lawmakers are poised to halt approval of the EU’s trade deal with the U.S. over President Donald Trump’s vow to impose tariffs on countries that supported Greenland in the face of ...