A dog emerged from the dark, stood still a few seconds under the northern lights, then disappeared again into the tundra. Teriberka, Russia, April 2021

‘With the aurora borealis flaming coldly overhead, or the stars leaping in the frost dance, and the land numb and frozen under its pall of snow, this song of the huskies might have been the defiance of life, only it was pitched in minor key, with long-drawn wailings and half-sobs, and was more the pleading of life, the articulate travail of existence.’ From The Call of the Wild by Jack London, 1903; Nanna Heitmann

Photograph: Nanna Heitmann/Magnum Photos