Benjamin Barthelemy,Benjamin Barthelemy / Ibex (Capra Ibex) fighting, Aiguilles Rouges National Nature Reserve, Haute-Savoie, France, June

Enrique Lopez-Tapia / Travelers watching lava on Erta Ale volcano crater. Afar Region, Ethiopia, Africa. November 2014.

David Pattyn / Puffin (Fratercula arctica), Hornoya, Varanger, Finnmark, Norway, April.

Steven Kazlowski / Polar bear (Ursus maritimus) sow with two juveniles walk along the ice edge during autumn freeze up, Beaufort Sea, off Arctic coast, Alaska

Terry Whittaker / Pine marten (Martes martes) walking along edge of water, orange glow in sky behind from the lights of Inverness. Black Isle, Scotland, UK, September. Photographed by camera trap.

Alex Hyde / Takob-Akob Falls plunging 38 metres through the rainforest. Southern plateau edge, Maliau Basin, Sabah, Borneo, May 2011.

Floris van Breugel / Two Guanacos (Lama guanicoe) at edge of lake with Cuernos del Paine beyond. Torres del Paine National Park, Chile, June 2014.

Stephen Dalton / Close-up of a shell, UK.

Frederique Olivier / Adelie penguins (Pygoscelis adeliae) preening at edge of ice, Antarctica.

Hougaard Malan / Large wave crashing against rock shelf. Luphathana, Pondoland, Eastern Cape, South Africa. June 2012.

Dong Lei / Himalayan goral (Naemorhedus goral) in forest, Tangjianhe National Nature Reserve, Sichuan Province, China. April.

Ben Cranke,Ben Cranke / Gentoo Penguin (Pygoscelis papua) group travelling out to sea, Cuverville Island, Antarctic Peninsula, Antarctica