Milan Radisics / Aerial view of large pieces of calved ice in a meltlake beneath Hoffellsjokull, an outlet glacier of the Vatnajokull ice cap, Iceland, August 2018

Milan Radisics / Aerial view of large pieces of calved ice in a meltlake beneath Hoffellsjokull, an outlet glacier of the Vatnajokull ice cap, Iceland, August 2018

Milan Radisics / Aerial view of large pieces of calved ice in a meltlake beneath Hoffellsjokull, an outlet glacier of the Vatnajokull ice cap, Iceland, August 2018

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

SCOTLAND: The Big Picture / Big storm hitting cliffs, with waves breaking over the top, Shetland, Scotland, UK, July.

SCOTLAND: The Big Picture / Big storm hitting cliffs, with waves breaking over the top, Shetland, Scotland, UK, July.

Juergen Freund / Guttering to redirect water at the Daintree Drought Experiment, where rainforest plants grown under cover to see how they respond to drought. Daintree Rainforest Observatory, northern Queensland, Aust...

Juergen Freund / Scientist Susan Laurance leads the Daintree Drought Experiment in far north Queensland. The experiment combines the efforts of plant physiologists, ecologists, soil experts, climatologists and hydrolo...

Juergen Freund / Bleached Staghorn corals (Acropora cervicornis), Great Barrier Reef, Australia, 2017.

John Waters / Floodwater flowing over banks of the River Parrett onto Aller Moor, near Burrowbridge, Somerset Levels, England, UK, January 2014.

Eric Baccega / Polar bear (Ursus maritimus) swimming in front of an iceberg, Arctic Bay, Baffin Island, Nunavut, Canada, June.