Sea ice still exists in the Arctic summer. Greenhouse gas emissions will decide how much longer. Photo: Julia Hager The retreat of sea ice in the Arctic raises many questions: When will the Arctic be ice-free? What does the loss of ice mean on a large and small scale?...
In the Arctic, as here on Svalbard, Arctic terns like to use gravel banks as breeding sites and lay one to three eggs in a sparsely lined nest. They defend their brood by swooping down on intruders. (Photo: Julia Hager) Arctic terns, which fly from pole to pole and...
