The Akademik Lomonosov is on its way to the remote eastern region of Chukotka to provide electricity for 50,000 people.
The controversial floating power plant will be towed through the Baltic Sea and narrow European straits to get to the Arctic.
Evidence that the Arctic is warming rapidly extends far beyond shrinking ice caps and buckling roads.
The video shows what's happening both outdoors and inside the submarine, too.
Glaciers around the world are an important source of fresh drinking water.
Russia's defense minister gave a detailed review of his country's military upgrade in the Arctic.
Troops are training in subzero temperatures with little visibility.
The first member of the flock to spy the recording object goes in for a close-up, before a friend tries to hijack his spot.
"They're a seal-eating species. It's what they do."
Vladimir Putin has outlined the Arctic where Russia expects the U.S. and others to vie for "intimidating supremacy."
China has for the first time revealed its Arctic Policy. Will it follow Russia in bringing military power to the resource-rich region?
The village's electronic thermometer, installed to showcase the town's famously wintry climes, reportedly broke after hitting -62 degrees Fahrenheit this week.
The rate of fire increased by a third compared to the year prior, as Russia continues to pad out its Arctic military capabilities.
Schools across the Northeast have canceled classes for Thursday because of the frigid temperatures.
Fight for space or freeze on the streets: That's the chilling choice that homeless people across the United States face this week.
What does this mean for life beyond Earth?
The Arctic National Wildlife Refuge is on the verge of being opened to oil drilling.
Both NATO and Russia have been very active and increasingly aggressive over the past year or so.
The Sibir weighs 33,500 tons, is more than 576 feet long and is fueled by two nuclear reactors, giving it the power to plow through icy Arctic terrain.
Remains of a baby and an adult dating back 800 years were found in burial cocoons at the archaeological site.
Sea ice is unexpectedly in motion, making the expedition far too dangerous.