Bryan and Cherry Alexander / Chukchi girls, with their family's ancestral clan mark painted in reindeer blood on their face, a ritual during the Chukchi 'Festival of the Young Reindeer' during which young reindeer are sacrificed....

Staffan Widstrand / Photographer Staffan Widstrand, Svalbard, Norway, September 2014. Model released.

Bryan and Cherry Alexander / Polar Photographers Bryan and Cherry Alexander in fur trimmed parkas, July 2012.

Bryan and Cherry Alexander / Young girl Nadia Takui eating specially prepared ritual food, including dried reindeer intestine and a sausage made from chopped reindeer meat and fat, during the Chukchi 'Festival of the Young Reind...

Bryan and Cherry Alexander / The men and children of the family place specially prepared food on the ground for the spirits during the Chukchi 'Festival of the Young Reindeer' during which young reindeer are sacrificed. Iultinsk...

Frederique Olivier / Emperor penguin (Aptenodytes forsteri) chick portrait, on its final journey to the sea, Antarctica, December.

Bryan and Cherry Alexander / Inuit girl warmly dressed in fox fur hooded jacket (kapataq). Northwest Greenland, 1987.

Doug Allan / Moulting Harp seal pup {Phoca groenlandicus} in ragged jacket Gulf of St Lawrence Canada

Bryan and Cherry Alexander / Selkup man, Kosta, hunting in snow covered forest, on skis. Krasnoselkup, Yamal, Western Siberia, Russia.

Bryan and Cherry Alexander / An Inuit girl, Sofie, warmly dressed in a fox fur hooded jacket (kapataq). N.W. Greenland. 1987