Moss balls seem to roll around glaciers in a coordinated way, and researchers can't explain why the whole group moves at about the same speed and in the same direction.
As if the pandemic weren't enough, people are wondering whether climate change will cause pathogens buried in frozen ground to come back to life as the Arctic warms. How worried should we be?
The topics range from a ticking time bomb in the Arctic to the art of taking selfies in an ethical way. Here are the stories selected by our contributors.
Kunuk Nielsen and his brother Pilu grew up on a sheep farm in southern Greenland. Kunuk has decided to remain on the farm. Pilu gives helicopter tours to visitors, who are arriving in greater numbers.
Natural disasters, protests and stark scientific reports are heightening concern over climate change. And companies are under pressure from banks and investors to green their corporate images.
A ship of researchers is crossing the Arctic for a year attached to an ice floe. But finding the right chunk of sea ice was a challenge, in part because warmer temperatures are making it thinner.