Jack Dykinga / Scalding hot water continuously spouting behind layers of mineral deposits, Fly Geyser, Black Rock Desert, Great Basin Desert, Nevada, USA

Ingo Arndt / Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, Wyoming, USA, September 2011.

Ingo Arndt / View of Badlands National Park, with shadows cast between mountain peaks, and sediment layers visible, South Dakota, USA. September 2009.

Ingo Arndt / View of Badlands National Park, with shadows cast between mountain peaks, and sediment layers visible, South Dakota, USA. September 2009.

Kirkendall-Spring / Squaretop Mountain, Bridger Wilderness of the Wind River Range, Bridger National Forest, Wyoming, USA.

John MacPherson / Reindeer (Rangifer tarandus) fighting, Cairngorms National Park, Scotland, UK, March.

Andy Trowbridge / Matterhorn (4,478m) at sunrise, with reflection in Lake Stellisee, Zermatt, Switzerland, September 2012.

Pete Oxford / Three granite peaks of Paine mountain range, Torres del Paine National Park, Patagonia, Chile.

Peter Cairns / Selfoss waterfall in autumn with snow, north Iceland, September 2013.

Peter Cairns / Twilight over Flakstad beach, Lofoten, Norway. February 2014.

Ole Jorgen Liodden / Ice cliff of the Austfonna ice cap with melt water and ice crashing down to the sea, Svalbard, Norway, July 2012.

Jean E. Roche / Aerial view of Salin de Giraud, Camargue, France, July.

Erlend Haarberg / Red fox (Vulpes vulpes) in snow, Varanger Peninsula, Norway.

Floris van Breugel / Flawless crystalline ice, produced through millennia of glacial pressure, floating on Lago Grey, Torres del Paine National Park, Chile, June 2014.

Olga Kamenskaya / Coast of Olkhon island, Lake Baikal, Siberia, Russia, September 2013.

Hougaard Malan / Misty morning in the Drakensberg viewed from behind the Organ Pipes. Cathedral Peak Region, Drakensberg, South Africa. November 2012.

Hougaard Malan / Tugela falls surrounded by clouds on a misty morning. Royal Natal National Park, Drakensberg, South Africa. November 2010.

Hougaard Malan / Stormy weather over Blyde River Canyon, Mpumalanga, South Africa. January 2011.

Hougaard Malan / View from a high dune across desert landscape in morning light. Namib Rand, Namibia. April 2012.

Orsolya Haarberg / Kirkefjorden and surrounding mountains, viewed from Reinebringen. Hammarskaftet can be seen in foreground. Moskenes municipality, Lofoten, Nordland, Norway. October 2012

Floris van Breugel / Zebra Slot Canyon, Escalante National Monument, Utah, USA, November 2010.

Will Burrard-Lucas / Big-headed mole rat (Tachyoryctes macrocephalus) appearing from its hole, Bale Mountains National Park, Ethiopia. Taken with remote camera.

Jean E. Roche / Wind blowing sand across beach, causing delta patterns, Piemanson, Camargue, France, October.

Colin Varndell / Contorted vertical beds at Durdle Dor, Dorset, UK.

Kirkendall-Spring / Lower Yellowstone Falls on the Yellowstone River viewed from Artist Point, Yellowstone National Park, Wyoming, USA, June 2013.

Kirkendall-Spring / John Day Fossil Beds National Monument, Painted Hills Unit, Oregon, USA, May 2013.

Kirkendall-Spring / Red Hill in John Day Fossil Beds National Monument, Painted Hills Unit, Oregon, USA, May 2013.

Kirkendall-Spring / Travertine limestone terraces of Mammoth Hot Springs in Yellowstone National Park, Wyoming, USA, June 2013.

Kirkendall-Spring / Starry night sky over Smith Rocks State Park, Oregon, May 2013.

Kirkendall-Spring / Hills in the Lamar Valley, in snow, Yellowstone National Park, Wyoming, USA, February 2013.

Jouan Rius / Half Dome and Sierra Nevada from Glacier point, Yosemite National Park, California, USA, October 2012.

Tui De Roy / Volcanic caldera - caldera lake steaming after eruption. Fernandina Island, Galapagos, Ecuador.

Andy Rouse / Coquerel's Sifaka (Propithecus coquereli) jumping, Palmarium Reserve, Madagascar

Andy Rouse / Coquerel's Sifaka (Propithecus coquereli) jumping, Palmarium Reserve, Madagascar

Andy Rouse / Verreaux Sifaka (Propithecus verreauxi) jumping ('dancing') across ground, Madagascar

Andy Rouse / Verreaux Sifaka (Propithecus verreauxi) jumping ('dancing') across ground, Madagascar

Andy Rouse / Verreaux Sifaka (Propithecus verreauxi) jumping ('dancing') across ground, Madagascar

Andy Rouse / Verreaux Sifakas (Propithecus verreauxi) jumping ('dancing') across ground, Madagascar

Jouan Rius / Sandstone cliff at sunset, Colorado Plateau, Kodachrome Basin State Park, Utah, USA November 2012

Jouan Rius / Sandstone monoliths, Colorado Plateau, Kodachrome Basin State Park, Utah, USA November 2012

Jouan & Rius,Jouan Rius / Red Cliffs in Zion Canyon during winter, Zion National Park, Utah, USA December 2012

Ernie Janes,Ernie Janes / Yellow Labrador jumping breakwater, Norfolk. April

Mike Potts / Fish drying on racks, Varangerfjord, Norway, March 2013.

Tim Laman / Rock outcrops among tree fern forest at 3300 m elevation. Jayawijaya Mountains, New Guinea. June 2010

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...

Orsolya Haarberg / Lichen-covered rocks in snowy winter landscape. Sandfjorden, Varanger, Finnmark, Norway. March 2010

Denis-Huot / Sossusvlei dunes, wind in rainy season, Namib-Naukluft National Park, Namib desert, Namibia, April 2008

Denis-Huot / Chalk rock formations caused by sand storms, White desert in the Sahara, Egypt, February 2009

Kirkendall-Spring / Perspective of mountain biker over handlebars, Taylor Canyon, Island In The Sky District. Canyonlands National Park, Utah, October 2012. Model released.

George Sanker / Freshwater marshland, Acadia National Park, Maine. Novemebr 2012

Andy Trowbridge / Mountain Peaks at dusk, from left to right, Aiguille de Blaitiere, Aiguille de Cigeaux, and Aiguille du Fou. Chamonix, France, September 2012

Ben Lascelles / Prostrator about to perform body-length prostrations over the entire length of the circumambulation around Mount Kailash. The pilgrim bends down, kneels, prostrates full-length, makes a mark with his...

Ben Lascelles / Tsaparang (sometimes known as the mythical Shangri-la) was the capital of the ancient kingdom of Guge in the Garuda Valley, Ngari Prefecture, Western Tibet.

Florian Möllers / Blue iceberg drifting off Brasvellbreen glacier, Austfonna, Nordaustlandet, Svalbard, Norway, July 2012

Gavin Hellier / Volcanic tufa rock formations, Uchisar, Cappadocia, Anatolia, Turkey, 2008

Jeff Vanuga / Aerial view of Grand Prismatic Springs Midway Geyser Basin. Yellowstone National Park, Wyoming, July 2011.

Staffan Widstrand / Lichen (Xanthoria sp) growing on rocks by coastline, Svalbard, Norway

Oriol Alamany / Angel Glacier with morraine, Jasper National Park, Rocky Mountains, Alberta, Canada

Steven Kazlowski / Trans-Alaskan Pipeline, with blooming fall tundra colours, that runs from Prudhoe Bay on the Arctic coast to Valdez at the north central coast of Prince William Sound, Alaska, USA

Peter Cairns / Reflections in glacial fjord, Kongsfjorden, Svalbard, Norway

Jack Dykinga / Matkatamiba Canyon with its Muave limestone scoured by erosion. Grand Canyon National Park, Arizona. May 2012.

Mark Taylor / Sliding Stone or Moving Rock of Racetrack Playa, Death Valley, California, USA

Mark Taylor / Mt Fitz Roy and Laguna Los Tres, panoramic view, Fitzroy National Park, Argentina

Mark Taylor / Perito Moreno Glacier, panoramic view, Argentina, January 2010

Jean E. Roche / Rhone Glacier scarring in 2004, with buildings in foreground. Compare with image 1403312 showing signs of glacial retreat.

Jean E. Roche / Reproduction of early 20th century postal card possibly by Chr. Brennenstuhl, showing glacier 'Rhone Glacier' in Swiss Alps and mountains with buildings in foreground. Compare with image 01403313 show...

David Noton / Person walking along sand dunes, Namib Desert, Namibia, Southern Africa. Model released.

David Noton / Les Aiguilles de Bavella, Corsica, France. June 2011.

David Noton / Chocolate Hills, Bohol, The Visayas, Philippines. February 2011.

Jack Dykinga / Eroded Aztec sandstone, dating back to the Jurassic, 160 million years ago, colourful banding with fins and dikes produced by erosion, Mojave Desert near Las Vegas, Nevada, USA

Jack Dykinga / Colorado River Delta, with watercourse sculpted patterns eroded into the salt / silt flats near the Sea of Cortez, La Reserva del Golfo, Baja, Mexico

Jack Dykinga / Cibecue Creek waterfall pouring through canyon narrows, White Mountain Apache Reservation, Arizona, USA

Juan Carlos Munoz / Detail of geological rock formations in the sandstone cliffs of Jaizkibel Beach, Gipuzkoa, Basque Country, Spain, May 2012

Juan Carlos Munoz / Aerial view of Everglades National Park, Florida, USA, February 2012

Juan Carlos Munoz / Aerial view of Everglades National Park, Florida, USA, February 2012

Juan Carlos Munoz / Aerial view of sun reflected on the Odiel marshes, Huelva, Andalucia, Spain, March 2008

Konrad Wothe / Prehistoric Rock Art, Awis Valley, Akakus mountains, Libya, Sahara, North Africa, November 2007

Konrad Wothe / Stone engravings of Giraffes in Wadi Mathendous, Wadi Barjuj, Stony Desert, Libya, Sahara, North Africa, November 2007

Orsolya Haarberg / Large rock in the Hverfjall crater, Iceland, March 2011

Orsolya Haarberg / Svi­nafellsjokull glacier in the Vatnajokull ice cap, Skaftafell National Park, Iceland, March 2011

Orsolya Haarberg / Rain clouds over Blonduhli­darfjoll, Iceland, January 2011

Erlend Haarberg / Tourists walking on Blahnjukur Volcano, Rhyolite mountains, Landmannalaugar, Iceland, August 2008

Roy Mangersnes / Mist above Monaco Glacier, North west of Spitsbergen, Svalbard, Norway, August

Nick Turner / Crater lake with reflections of clouds in the water, Queen Elizabeth National Park, Uganda, January 2009.

Laurie Campbell / Sandstone cliffs, Rackwick Bay, Hoy, Orkney, Scotland, July 2004

Inaki Relanzon / Remarkable Rocks at night, Flinders Chase National Park, Kangaroo Island, South Australia State, Australia, September 2011.

Inaki Relanzon / Twelve Apostles rock formations, Great Ocean Road, Port Campbell National Park, Victoria State, Australia, September, 2011.

Inaki Relanzon / Lower peaks of the Mont Cervin / Monte Cervino / The Matterhorn massif, Pennine Alps, Switzerland / France border, April 2011.

Brent Stephenson / Columnar basalt formations at the 180 metre high Edinburgh Hill. Zodiac full of cruise ship tourists for scale. South Shetland Islands, Antarctica, December.

Brent Stephenson / Columnar basalt formations at the 180 metre high Edinburgh Hill. Zodiac full of cruise ship tourists for scale. South Shetland Islands, Antarctica, December.

Doc White / Steam from underwater volcanic activity. Socorro Island, Baja Mexico.

Chadden Hunter / Entering the ice caves of Mount Erebus, Antarctica. Taken on location for BBC Frozen Planet series, 2009

Hanne & Jens Eriksen / Fumarole in the Krafla volcano area, Iceland, June 2009

Martin Gabriel / Mountain ridges of Caldera de Taburiente silhouetted through clouds. View from Roque de los Muchachos, La Palma Island, Canary Islands, Spain, February.

Oriol Alamany / Torres del Paine rock towers, Torres del Paine National Park, Patagonia, Chile

Sven Zacek / 'Piusa Caves', man-made sand mines. Southern Estonia, Europe, April.