The first of three rounds of bitter air has arrived, threatening record lows in cities from the Midwest to the Northeast.

Hundreds brave frigid temps for annual New Year's Day polar plunge at Bradford Beach in Milwaukee We've tested lots of ...

This cargo plane accelerated normally — but when it was time to rotate, the nose wouldn’t lift, no matter how hard the crew ...

Mike Marcum didn’t have a lab, funding, or a PhD. Just a pile of salvaged electronics — and a theory. One night in Missouri, he fired up his homemade device. It formed a vortex. He tossed in a screw.

Above: A Von Karman vortex street downwind of the Canary Island chain in the eastern Atlantic Ocean off the coast of Africa on Feb. 27, 2015. Image credit: NASA Worldview. Editor's note: Meteorologist ...