A displaced polar vortex in Canada is set to unleash three waves of Arctic air through mid-December, "delivering the coldest conditions of the season so far," forecasters at AccuWeather said. "The ...

A forecast map from the National Weather Service (NWS) shows which states can expect the coldest conditions, with a fresh arctic blast expected this weekend. "Another shot of arctic air is on the way ...

A strong blast of Arctic air will drive temperatures sharply lower from the Midwest to the interior Northeast this weekend, bringing the season’s coldest weather so far for many, forecasters say.

Polar bears living in one of Greenland’s warmest regions are showing unusual genetic activity that scientists say could provide a clue to how these iconic predators respond to vanishing Arctic ice.

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