Milan Radisics / Aerial shot of a mass of calved ice in a meltwater lake beneath Fjallsarlon Glacier, southern Iceland, August 2018.

Milan Radisics / Aerial view of Hoffellsjokull, an outlet glacier of the Vatnajokull ice cap, Iceland, August 2018

Milan Radisics / Aerial shot of Kudafljot glacial river flowing over black volcanic soil, Iceland, August 2018.

Milan Radisics / Aerial shot of Kudafljot glacial river flowing over black volcanic soil, Iceland, August 2018.

Colin Monteath/ Hedgehog House / Icebergs in winter in lake, Hooker Glacier, Mount Cook, Mount Cook National Park, New Zealand

Loic Poidevin / Gorner glacier with Mont Rose and Lyskamm, Swiss Alps, Valais, Switzerland. September 2018.

Stefan Christmann / Drifts of snow around glacier, Atka Bay, Queen Maud Land, Antarctica. October 2017.

Sven Zacek / Bearded seal (Erignathus barbatus) sunbathing on iceberg broken off from glacier. Kongsfjorden fjord, Spitsbergen, Norway. June 2014.

Guy Edwardes / Ice on Diamond Beach, Jokulsarlon, Iceland, September 2017.

Shane P. White / Terminal moraine, Perito Moreno Glacier, Los Glaciares National Park, Patagonia, Argentina

Yva Momatiuk & John Eastcott / Ice climber scaling Skaftafellsjokull Glacier, Skaftafell National Park, Iceland

Yva Momatiuk & John Eastcott / Ice climbers atop Skaftafellsjokull Glacier, Skaftafell National Park, Iceland