A strong polar vortex moved across North America not long ago. Temperatures around Niagara Falls plunged below −20°C, far colder than usual. The mist .

That surge of adrenaline when spotting something valuable amid the ordinary creates an addictive treasure-hunting experience ...

To understand what Americans are experiencing with this winter blast, we need to look more than 20 miles above the surface of ...

The wintry weekend brought a pseudo-hurricane over Lake Michigan, and skyward pillars of light that aren't really what they ...