Spotted hyena (Crocuta crocuta) at night, Shompole, Kenya, East Africa, Africa

Ascent of Piz Boe Mountain on the Piazzetta Climbing Route, Dolomites, Alto Adige, Italy, Europe

A pack of Polar Wolves, White Wolves or Arctic Wolves (Canis lupus arctos) playing together, Parc Omega, Montebello, Quebec, Canada

Female Polar bear (Ursus maritimus) on pack ice, Svalbard Archipelago, Barents Sea, Norway

Female Polar bear (Ursus maritimus) on pack ice, Svalbard Archipelago, Barents Sea, Norway

Ascent of Piz Boe Mountain on the Piazzetta Climbing Route, Dolomites, Alto Adige, Italy, Europe

Ascent of Piz Boe Mountain on the Piazzetta Climbing Route, Dolomites, Alto Adige, Italy, Europe

Mountaineers climbing Vertainspitze mountain, Ortler Alps, province of Bolzano-Bozen, Italy, Europe

Male polar bear (Ursus maritimus) with a seal prey, Svalbard Archipelago, Barents Sea, Norway, Arctic

Female hiker walking on a snow slab, on the Laugavegur hiking trail, Hrafntinnusker-Álftavatn, Fjallabak Nature Reserve, Highlands of Iceland, Iceland, Europe

Hikers climbing Mt Marmolata, fixed rope route on west ridge, Dolomites mountain range, Italy, Europe

Female Polar bear (Ursus maritimus) jumping over ice floe, Svalbard Archipelago, Barents Sea, Norway

Antiquarian bookshop, stacked paperbacks, book spines

Young woman resting, hiker with backpack, water bottle, panorama, deep lake behind, historic Chilkoot Trail, Chilkoot Pass, alpine tundra, Yukon Territory, British Columbia, B. C., Canada

Stacked chairs

Abstract sculpture on a pier, made of stone and wood by Roland Lindner, Zingst, Fischland-Darss-Zingst, Baltic Sea, Mecklenburg-Western Pomerania, Germany, Europe

Wine barrels, province of Bolzano-Bozen, Italy, Europe

Wine barrels, province of Bolzano-Bozen, Italy, Europe

Close-up of person's feet wearing spiked traction cleats while walking on ice through the famous Franz Josef Glacier; West Coast, New Zealand

Travelers exploring the famous Franz Josef Glacier with its, blue ice caves, deep crevasses and tunnels that mark the ever changing ice formations; West Coast, New Zealand

Travelers entering an ice tunnel while exploring the famous Franz Josef Glacier with its, blue ice caves, deep crevasses and tunnels that mark the ever changing ice formations; West Coast, New Zealand

A close-up of a wild dog, Lycaon pictus, lying next to a dam, side profile. In black and white, Londolozi Wildlife Reserve, Sabi Sands, South Africa

A close-up of a wild dog, Lycaon pictus, lying next to a dam, side profile, Londolozi Wildlife Reserve, Sabi Sands, South Africa

Wild dog, Lycaon pictus, on a boulder, looking to the side, Londolozi Wildlife Reserve, Sabi Sands, South Africa

Wild dog, Lycaon pictus, on a boulder, looking to the side, Londolozi Wildlife Reserve, Sabi Sands, South Africa