The new discovery echoes a mission in 1931, when a five-day zeppelin flight sent robots to the stratosphere and redrew the maps of the high Arctic.

A field glaciologist explains the changes scientists are now seeing.

Polar bears are increasingly seeking sustenance in human trash because of melting sea ice and a loss of hunting opportunities. The result is a rise in human-bear conflict – and dead bears.

Polar bears that hunt from freshwater ice in Southeast Greenland are "the most genetically isolated population of polar bears anywhere on the planet."

Polar bears that hunt from freshwater ice in Southeast Greenland are "the most genetically isolated population of polar bears anywhere on the planet."

Research in Greenland shows how the presence of caribou and muskoxen can maintain the presence of rare arctic plants.

"Adult Greenlanders with the genetic variation have lower BMI, weight, fat percentage, cholesterol levels and are generally significantly healthier."

Sea ice is thinning at an alarming rate. Snow is shifting to rain. And humans worldwide are increasingly feeling the impact of what happens in the seemingly distant Arctic.

Climate change is making ocean levels rise in two ways. It’s a problem that will endure even after the world stabilizes and slashes greenhouse gas pollution.

Climate change is making ocean levels rise in two ways. It’s a problem that will endure even after the world stabilizes and slashes greenhouse gas pollution.