Sam Hobson / Rose-ringed / ring-necked parakeets (Psittacula krameri) in flight on way to roost in an urban cemetery, London, UK, January. Finalist in the Birds category, Wildlife Photographer of the Year Awards (...

Michele Westmorland / Underwater Sculpture Gallery off Molinere Point, created by Jason de Caires Taylor. Colonised by sea life, Grenada, West-Indies, Caribbean, May 2009. No release.

Sue Daly / The isthmus between Greater and Little Sark, bound in snow. The heaviest snowfall on Sark in living memory. Channel Islands, UK, December 2010.

Sue Daly / A snow-covered tree by a road. The heaviest snowfall on Sark in living memory. Channel Islands, UK, December 2010.

Edwin Giesbers / Ice patterns, with leaves frozen beneath the surface, the Netherlands

Ashley Cooper / Grave of Sir Ernest Shackleton at Grytviken cemetary on South Georgia. February 2014

Ashley Cooper / Sprinklers watering lawns during the worst drought in living memory, Fresno, California, USA. October 2014.

Ashley Cooper / Sprinklers watering lawns during the worst drought in living memory, Fresno, California, USA. October 2014.

Nick Upton / Bronze statue in memory of 'Nelson' a bull Grey Seal who frequented Looe island and harbour, Looe, Cornwall, UK, June 2012

Philippe Clement / Monument to the Bretons of Free France / Cross of Pen-Hir, inaugurated by General Charles de Gaulle in 1960, Pointe de Pen-Hir, Brittany, France June 2009

Sue Daly / A snow-covered tree by a road. The heaviest snowfall on Sark in living memory. Channel Islands, UK, December 2010.

Sue Daly / Road and trees covered in snow. The heaviest snowfall on Sark in living memory. Channel Islands, UK, December 2010.

Sue Daly / Isle of Sark visitor centre and trees covered in snow. The heaviest snowfall on Sark in living memory. Channel Islands, UK, December 2010.

Sue Daly / A snow-bound bay. The heaviest snowfall on Sark in living memory. Channel Islands, UK, December 2010.

Sue Daly / A tractor on a snowy road. The heaviest snowfall in Sark in living memory. Channel Islands, UK, December 2010.

Sue Daly / A bicycle covered in snow. The heaviest snowfall on Sark in living memory. Channel Islands, UK, December 2010.

Sue Daly / A tractor by a snow-bound road. The heaviest snowfall on Sark in living memory. Channel Islands, UK, December 2010.

Konstantin Mikhailov / Memory stone at the place of death of Dersu Uzala, the nanai hunter, Ussuriland, Primorsky krai, Far East Russia, October 2006.

Steven David Miller / White sand at Memory Cove Wilderness Area, Lincoln National Park, South Australia 2007

Michele Westmorland / Trees planted in memory of US soldiers at WWII gravesite, Guadalcanal, Solomon Islands

Michele Westmorland / Trees planted in memory of US soldiers at WWII gravesite, Guadalcanal, Solomon Islands

Michele Westmorland / Trees planted in memory of US soldiers at WWII gravesite, Guadalcanal, Solomon Islands

Michele Westmorland / Trees planted in memory of US soldiers at WWII gravesite, Guadalcanal, Solomon Islands

Richard Du Toit / African elephant {Loxodonta africana}, fondling bones of dead elephant, South Africa

Angelo Giampiccolo / Memorial on the Punta Papa Wreck, Ponza, Italy, in memory of a young diver who died scuba diving at the location.

Russell Laman / Cross on Windvane Hill, erected by the Ross Sea Party of Sir Ernest Shackleton's Imperial Trans-Antarctic Expedition in memory of three party members who died nearby. Cape Evans, Ross Island, McM...

David Fleetham / Statue of Buddha, Lahaina, Maui, Hawaii, erected in 1968 in memory of the Japanese sugar plantation workers who came to Hawaii in 1868

Ingo Arndt / Honey bee (Apis mellifera) returning to bee hive during an experiment for optical orientation and memory, Germany.