A polar vortex is currently hitting the United States, with schools closed in many areas and at least four deaths caused by treacherous conditions.

The Polar route is rapidly becoming viable (at least in the northern summer) as global warming shrinks the Arctic icecap. But even this route, at an estimated 30 days, puts China no closer to ...

The polar vortex will soon elongate over North America with a dangerous cold moving into sections of Canada and the U.S. One of the most notable and widespread Arctic outbreaks that we have seen ...