Rising Arctic temperatures and melting sea ice could be causing cold air to flow into the Northern Hemisphere. But not all ...

An unusually brutal winter storm is set to pummel more than 160 million Americans from Friday, as a stretched "polar vortex" sends a devastating blast of Arctic air, bringing heavy snows and freezing ...

Organic matter carried in rivers to the Russian part of the Arctic Ocean may be creating more clouds and keeping the region ...

The debate around the Arctic is becoming hotter than ever as US President Donald Trump insists Greenland should become part ...

The frigid temperatures, massive snow and deadly ice storm taking shape east of the Rockies might seem to conflict with life on a rapidly warming planet. But all of these things still happen, even ...

The North Pole is surrounded by a massive circular upper-air weather phenomenon in the Arctic called the polar vortex. It is ...

Meteorologists warn that a stretched polar vortex could bring severe winter weather to much of the United States.

As Trump points to Russia and China near Greenland, experts say the biggest Russian and Chinese activity is elsewhere in the Arctic.

Tens of millions of people are in the path of a major winter storm. Federal cuts threaten efforts to understand the causes of such weather.

Extreme humidity and triple-digit temperatures are affecting around 250 million people across the United States. Here's the science behind the heat dome that’s stifling the nation. A sunbather rests ...