Ingo Arndt / Grizzly bear (Ursus arctos horribilis) silhouette, Lake Clark National Park, Alaska

Ingo Arndt / Harvest Mouse (Micromys minutus) using tail whilst climbing in reed, Germany, captive.

Olga Kamenskaya / Ice stalagmites / ice spikes formation, Lake Baikal, Siberia, Russia, March.

Angelo Gandolfi / Gruta do Lago Azul, karst cave and lake in Bonito, Mato Grosso do Sul, Brazil, August 2010.

Juergen Freund / Bioluminescent fungi (Omphalotus nidiformis / Pleurotus nidiformis) glowing on tree trunk in rainforest at night, Atherton Tablelands, Queensland, Australia,

Eric Medard / Little owl (Athene noctua) on water pump in garden, taken at night with infra red remote camera trap, Mayenne, Pays de Loire, France.

Eric Medard / Barn owl (Tyto alba) flying through barn door at night, taken with infra red remote camera trap, Mayenne, Pays de Loire, France, November.

Eric Medard / Badger (Meles meles) in garden, taken at night with infra red remote camera trap, Mayenne, Pays de Loire, France, August.

Juergen Freund / Stars facing north towards constellation Perseus with Perseid meteor shower, above farming fields in the Atherton Tablelands, Far North Queensland. August 14, 2013 4am, composite image.

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

Mark MacEwen / Wedge-tailed Shearwaters (Puffinus pacificus) at night, Heron Island, southern Great Barrier Reef, Queensland, Australia. Taken with infra-red camera.

Jouan Rius / Antelope Canyon, a slot canyon with eroded sandstone patterns, Navajo Tribal Park, Arizona, USA, December 2012.