Steven Kazlowski / Northern lights (Aurora borealis) glowing brightly over trees along Steese Highway, Cleary Point, outside Fairbanks, Alaska

Jussi Murtosaari / Northern Lights over forest, central Finland, March 2013

Jussi Murtosaari / Mountain Apollo (Parnassius apollo) in flight, southwest Finland, February, July.

Tom Gilks / Man climbing and harvesting Khat tree (catha edulis) Meru, Kenya

Denis-Huot / Masai giraffe (Giraffa camelopardalis tippelskirchi) group feeding, Masai-Mara Game Reserve, Kenya

Alex Mustard / Trees and sky photographed at dawn through the surface of Three Sisters Spring, Crystal River, Florida, United States of America.

Sven Zacek / Common cuckoo (Cuculus canorus) perched in Spruce tree top after sunset, Southern Estonia, June.

Juan Carlos Munoz / Giant panda (Ailuropoda melanoleuca) at the top of a tree, Sichuan, China, January

David Tipling / Aerial walkway through Rainforest canopy at Exploramo Lodge, Iquitos Region, Amazon, Peru

Gavin Hellier / Wenkchemna Peaks or Ten Peaks rising over Moraine lake in the snow, near Lake Louise, Banff National Park, Alberta, Canada, 2007

Juan Manuel Borrero / Mixed forest in Val d'Aran / Aran Valley in the mist, Pyrenees, Lleida Province, Spain, June

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