Arctic amplification

From declining reindeer populations to a younger, thinner ice pack, here are four image-based stories from the 2018 Arctic Report Card. 

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.

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