The world's most iconic waterfalls sees millions of visitors every year - but this week they are being treated to a very rare ...

Niagara, as with much of southern Ontario and the United States, is in the midst of a polar vortex, which is an area of low pressure and cold air that typically rests over the North Pole, occasionally ...

A strong, stable vortex is like a skater spinning with their arms tucked closely in, holding in an area of cold air over the ...

two bands of fast-moving air – the polar jet stream and the stratospheric polar vortex – sometimes tango together to influence weather in the northern hemisphere. As the Arctic continues ...

The system, known as a polar vortex, is forecast to bring subzero temperatures to the Midwest, Mid-Atlantic and deep into the South. And it looks as if we may get more arctic blasts in the coming ...

Extreme cold and snow smacked the Gulf Coast states this week, but the polar vortex may not be to blame. Freelance writer Amanda C. Kooser covers gadgets and tech news with a twist for CNET.

But during the winter, it is joined by a second atmospheric phenomenon dubbed the polar vortex. This swirl of frigid air, located more than 10 miles above Earth’s surface, strengthens each year ...