Uri Golman / Head portrait of photographer Uri Golman in temperatures of -40 degrees celsius, with frost in his beard. Greenland. March 2009. Model released

Doug Allan / Emperor penguin males incubating eggs huddle for warmth at -40 degrees centigrade, winter, Antarctica. Green is excrement on snow. {Aptenodytes forsteri}

Doug Allan / Emperor penguin {Aptenodytes forsteri} males huddle for warmth in minus 40 degrees centigrade while incubating eggs in winter, Antarctica Winter extreme cold survival birds seabirds nesting-behaviour

Yva Momatiuk & John Eastcott / Sandstone rock formations, Vermillion Cliffs National Monument, Arizona

Alex Mustard,Alex Mustard / A diver and a hydrothermal chimney. Note that he is obscured by the different temperature waters (from the chimney and the surrounding water) which are unable to mix. The sea water was 4 degrees Celsi...

Chadden Hunter / Cameraman Jeff Turner and Producer Chadden Hunter exposed at -40 degrees in Arctic circle in Northern Canada while filming wolves and bison hunting sequence. Taken on location for BBC Frozen Planet se...

Ole Jorgen Liodden / Iceberg in calm arctic seas at 80 degrees north. Svalbard, September.

Bryan and Cherry Alexander / Boiling water exploding into vapour and ice when thrown into cold air at -51 degrees celsius. This is because boiling water is close to a gas and breaks into tiny droplets that freeze simultaneously....

Wild Wonders of Europe / Munier / Man at Roros market which has been there since 1854, exhibitors and vendors come from a long way off, travelling by horse and sleigh, -35 degrees centigrade, Dovrefjell National Park, Norway, February...

Wild Wonders of Europe / Munier / People walking and travelling by horse and sleigh to Roros market. Started in 1854, exhibitors and vendors come from a long way off, -35 degrees centigrade, Dovrefjell National Park, Norway, February...

Wild Wonders of Europe / Munier / People travelling by horse and sleigh to Roros market. Started in 1854, exhibitors and vendors come from a long way off, -35 degrees centigrade, Dovrefjell National Park, Norway, February 2009

Yukihiro Fukuda / Japanese macaque / Snow monkey {Macaca fuscata} 7-month-old monkey bathing in hot springs, examining its hands, water at 40 degrees, Jigokudani, Nagano, Japan