Polar vortex maps show where arctic blast is set to freeze the U.S. as far as the Deep South
A polar vortex dipping down from Siberia will bring a cold front with frigid temperatures to nearly 300 million Americans.
Arctic hotspots study reveals areas of climate stress in Northern Alaska and Siberia
Ecological warning lights have blinked on across the Arctic over the last 40 years, according to new research, and many of ...