Jurgen Freund / Volcano erupting with laval flow. Siau island Sangihe Talaud Is Sulawesi Indonesia

Ole Jorgen Liodden / Polar bear (Ursus maritimus) on drifting ice floe. Svalbard, Norway.

Jack Dykinga / Patterns in the tidal flats of the delta where the delta is swept by tidal encroachment from the Gulf of California. Evidence of the fresh water flow is observable as plant life turns green. Colorado...

Morley Read / Aerial tracking shot of a waterfall flowing over an old andesitic lava flow, Rio Pita Valley north of Cotopaxi Volcano, Ecuadorian Andes, 2018.

Milan Radisics / Aerial shot of cars on Route 1, passing through a lava flow landscape from the Laki eruption in June 1783, Skaftareldar, Iceland, August 2018.

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

Jurgen Freund / Wide angle shot of Barron Falls after a cyclone, showing increased flow of water, Wet Tropics World Heritage Area, Cape Tribulation, North Queensland, Australia. 2017.

Jurgen Freund / Close-up of Barron Falls after a cyclone, showing increased flow of water, Wet Tropics World Heritage Area, Cape Tribulation, North Queensland, Australia. 2017.

Guy Edwardes / Buachaille Etive Mor, Glen Etive, Glencoe, Highlands, Scotland, UK. July, 2012.

Guy Edwardes / River Etive with isolated cottage beneath Buachaille Etive Mor, Rannoch Moor, Glen Coe, Highlands, Scotland, UK. November, 2013.

Guy Edwardes / River Braan at Black Linn Falls, The Hermitage, Dunkeld, Perthshire, Scotland, UK. October, 2013.

Guy Edwardes / Fairy Pools with Black Cuillin mountains in background, Isle of Skye, Inner Hebrides, Scotland, UK. January 2014.

Guy Edwardes / Fairy Pools with Black Cuillin mountains in background, Isle of Skye, Inner Hebrides, Scotland, UK. January 2014.

Guy Edwardes / Waterfall with Buachaille Etive Mor in background, Glen Coe, Highlands, Scotland, UK. January 2014.

Andy Rouse / Polar bear (Ursus maritimus) standing on pack ice at the water's edge, Svalbard, Norway. June.

Ingo Arndt / Polar Bear (Ursus maritimus) on icefield with moon in late winter, Svalbard, Spitsbergen, Norway, April

Doug Perrine / Hot lava from the 61G flow, emanating from Pu'u O'o on Kilauea Volcano, flows over sea cliffs into the ocean under the stars and moon, Kamokuna, Kalapana, Hawaii Volcanoes National Park, Puna, Hawaii...

Wim van den Heever / White tailed sea eagle (Haliaeetus albicilla) feeding on fish on pack ice, Hokkaido, Japan, February.

Wim van den Heever / White tailed sea eagle (Haliaeetus albicilla) in flight landing, Hokkaido, Japan, February.

Wim van den Heever / Steller's sea-eagle (Haliaeetus pelagicus) standing on pack ice, Hokkaido, Japan, February.

Wim van den Heever / Steller's sea-eagle (Haliaeetus pelagicus) landing on pack ice, Hokkaido, Japan, February.

Ole Jorgen Liodden / Polar bear (Ursus maritimus) standing on ice floe, looking at camera. Svalbard, Norway. August.

Ole Jorgen Liodden / Polar bear (Ursus maritimus) walking across vast ice floe, Spitsbergen, Svalbard, July 2013.

Klein & Hubert / Three Emperor penguin (Aptenodytes forsteri) chicks walking on pack ice in front of blue iceberg, Antarctica

Klein & Hubert / Three Emperor penguin (Aptenodytes forsteri) walking in line on pack ice in front of blue iceberg, Antarctica

Klein & Hubert / Two Emperor penguin (Aptenodytes forsteri) on pack ice, Antarctica

Klein & Hubert / Three Emperor penguin (Aptenodytes forsteri) sliding on pack ice, Antarctica

Klein & Hubert / Emperor penguin (Aptenodytes fosteri) chick walking on pack ice, Antarctica.

Klein & Hubert / Emperor penguins (Aptenodytes fosteri) and chicks on pack ice, Antarctica

Steven Kazlowski / Polar bear (Ursus maritimus) curious young bear approaching camera, over newly forming pack ice during autumn freeze up, Beaufort Sea, off Arctic coast, Alaska

Steven Kazlowski / Polar bear (Ursus maritimus) juvenile crossing over newly forming pack ice, during autumn freeze up, Beaufort Sea, off Arctic coast, Alaska

Sergey Gorshkov / Plume of volcanic ash lit by a basaltic lava flow from the Tolbachik volcano complex, Kamchatka, Far East Russia, eruption lasted from December 22nd 2012 through to January 2nd 2013

Sergey Gorshkov / Plume of volcanic ash lit by a basaltic lava flow from the Tolbachik volcano complex, Kamchatka, Far East Russia, eruption lasted from December 22nd 2012 through to January 2nd 2013

Ben Cranke / Steller's Sea Eagle (Haliaeetus pelagicus) stood on ice floe, Hokkaido, Japan. February.

Fred Olivier / View of icebergs and pack ice at sunset, seen from a moving boat, Antarctica.

Fred Olivier / View of Adelie penguins (Pygoscelis adeliae) swimming underwater, Antarctica.

Fred Olivier / Group of Adelie penguins (Pygoscelis adeliae) diving from the edge of the sea ice, Antarctica.

Fred Olivier / Group of Adelie penguins (Pygoscelis adeliae) walking away from the camera on sea ice at sunset, with one solitary penguin in the foreground, Antarctica.

Fred Olivier / Group of Adelie penguins (Pygoscelis adeliae) running and gathered on sea ice, Antarctica.

Fred Olivier / Adelie penguin (Pygoscelis adeliae) colony, with icebergs and pack ice in the background, Antarctica.

Robert Thompson / River Gave de Gavarnie with Cirque du Gavarnie in the distance, Pyrenees National Park, France, June 2013.

Robert Thompson / River flowing from Lac de Gaube, Pyrenees National Park, Hautes Pyrenees, France, July 2013.

Sergey Gorshkov / Tolbachik Volcano erupting with lava flowing down the mountain side. Kamchatka, Russia. November 29th 2013. Winner of the Wildscapes category, Wildlife Photographer of the Year Awards (WPOY competitio...

Nick Garbutt,Nick Garbutt / Tourist watching masses of butterflies drinking from temporary pools. Various species including Large Orange Sulphur (Phoebis agarithe), Cloudless Sulphur (Phoebis sennae), White-angled Sulphur (Anteo...

Peter Cairns / 2020VISION / Aerial view of Forsinard Flows blanket bog, Forsinard, Caithness, Scotland, UK, May 2012.

Peter Cairns / 2020VISION / Aerial view of Forsinard Flows blanket bog, with conifer plantations, Forsinard, Caithness, Scotland, UK, May 2012.

Sergey Gorshkov / Plume of volcanic ash lit by a basaltic lava flow from the Tolbachik volcano complex, Kamchatka, Far East Russia, eruption lasted from December 22nd 2012 through to January 2nd 2013.

Sergey Gorshkov / Basaltic lava flow from the Tolbachik volcano complex, Kamchatka, Far East Russia, eruption lasted from December 22nd 2012 through to January 2nd 2013.