President Obama has given Shell the green light to drill for oil in the Arctic Ocean, but activists and politicians in Seattle are throwing up as many stop signs as they can as the drilling rig preps there for its journey north. It's the latest flashpoint in the growing international anti-fossil fuel movement.
The Arctic permafrost is like the world’s refrigerator, holding onto and preserving organic material. But when it thaws, as it's increasingly doing now, microbes in the soil kick into action and produce enormous amounts of greenhouse gases.
On a research voyage through the Arctic ice cap, a scientist has a eureka moment, one that he hopes will help solve some of the riddles about Arctic ice melt — and what's ahead for the rest of the planet as the climate warms up.
NASA says January 2016's temperatures were the "greatest departure from average" of any month on record. That's globally. But the spike in temperatures last month was particularly pronounced in the Arctic.
While it's been unusually cold and snowy in much of Europe, the Arctic has been seeing record warm temperatures and a huge loss of ice. Here's how the two are linked, and what they might have to do with climate change.