March 13, 2017

This year's Iditarod sled dog race is underway, but it was forced to start hundreds of miles farther north than usual due to poor snow conditions.

September 16, 2016

The Northwest Passage across the Canadian Arctic opened once again in 2016 as sea ice reached its second lowest extent on record.

December 1, 2011

Satellite observations show that as the Arctic tundra has grown warmer in the past three decades, it has also grown “greener.”