Don't put away that winter jacket just yet. The polar vortex is expected to be impacted by a sudden warmup of the stratosphere, which will bring freezing temperatures to the Northeast this weekend and ...

Greetings from Ice Planet Hoth. Indeed, much of the eastern United States resembles the fictional frozen Star Wars world, and now folks there are now enduring some of the worst cold on Earth: "The ...

Record cold temperatures are once again expected to hit a swath of the country this weekend—even plunging Florida into its coldest stretch of the last 15 years, potentially bringing snow to areas of ...

Three polar bear cubs gather around their tranquilized mother. She had a litter of three cubs (an unusual brood size) and the smallest cub only weighed 11 pounds (five kilograms). Jon Aars / Norwegian ...

Polar bears are the poster children of climate change—and for good reason. These giant bears hunt, mate and spend their days hanging out on Arctic sea ice, which is rapidly disappearing as the climate ...

Polar bears have been getting fatter even as sea ice disappears in Norway’s Svalbard archipelago, the fastest-warming place on Earth – but scientists don’t expect the good times to last. The northern ...

Seals favored by Svalbard bears are becoming easier to hunt as ice declines, a study found. But researchers say the situation may be temporary. By Eric Niiler The population of polar bears in Norway’s ...

PARK CITY, Utah — In the snowy subarctic wilds of northern Manitoba, the Inuit have a word for polar bears who’ve lost their fear of being around humans: avinnaarjuk, or “nuisance bear.” That’s a ...

The polar vortex collapsed, and severe temperatures are set to dominate most of the country in the coming days. Single-digit temperatures are forecast for much of the Northeast, and subzero ...

Microbes across Earth's coldest regions are becoming more active as glaciers, permafrost and sea ice thaw, accelerating carbon release and potentially amplifying climate change, according to a new ...

In the wake of the historic winter storm that blasted 40 states this weekend, a dome of Arctic air associated with the Polar Vortex is bringing days of life-threatening temperatures to much of the ...