A polar vortex dipping down from Siberia will bring a cold front with frigid temperatures to nearly 300 million Americans.

A new blast of Arctic air sweeping from north to south will bring bone-chilling temperatures to millions of Americans this weekend and next week.

Our weekly roundup of the latest science in the news, as well as a few fascinating articles to keep you entertained over the ...

An expanding polar vortex is expected to lower temperatures across the eastern half of the U.S., with the potential for ...