Anup Shah / Western chimpanzee (Pan troglodytes verus) infant male 'Flanle' aged 3 years playing with his grandmother 'Fana' aged 54 years, Bossou Forest, Mont Nimba, Guinea. January 2011.

Fiona Rogers / Western chimpazee (Pan troglodytes verus) infant male 'Flanle' aged 3 years carried on the back of his grandmother 'Fana' aged 54 years, Bossou Forest, Mont Nimba, Guinea. January 2011.

Loic Poidevin / Family outside their home on the Grand Casso Pass, Ethiopian highlands, Rift Valley, Ethiopia, February 2009

Bryan and Cherry Alexander / Nyaka, an elderly Nenets woman, comforts her baby grandaughter in a cradle inside their reindeer skin tent. Tambey tundra, Yamal Peninsula, Western Siberia, Russia. March 2011

Bryan and Cherry Alexander / Nyaka, an elderly Nenets woman, using reindeer sinew to sew traditional clothing inside her family's reindeer skin tent. Tambey tundra, Yamal Peninsula, Western Siberia, Russia. March 2011

Bryan and Cherry Alexander / Nyaka, an elderly Nenets woman, rocks her grandaughter in a cradle inside their reindeer skin tent. Tambey tundra, Yamal Peninsula, Western Siberia, Russia. March 2011

Bryan and Cherry Alexander / Girl and grandmother milking Reindeer / Caribou (Rangifer tarandus) at herders' camp. Todzhu, Tuva, Siberia, Russia, 1998.

Lisa Hoffner / "Titienda" shop - owner with grandson tending their small grocery store in Los Limites, Colombia. Advertising the presence of the cotton-top tamarin in their forests helps educate the community and is...

Jane Burton / Unspeyed bitch has taken over her daughter's 4-day pups. Dogs phantom pregnancy coincided with the birth of her daughters pups

Jane Burton / Sable Border Collie bitch grandmother suckling two grandchildren

Martin Dohrn / Kuna indian grandmother in boat with child, San Blas islands, Panama

Bryan and Cherry Alexander / Khanty herder standing on sled, with Reindeer / Caribou (Rangifer tarandus). Khanty Mansiysk, Western Siberia, Russia, 2000.

Bryan and Cherry Alexander / Severe winter storm hitting Inuit community of Savissivik, Northwest Greenland, 1998.

Bryan and Cherry Alexander / Icebergs frozen in frazil ice (ice crystals) at beginning of winter. Northwest Greenland, 1991.

Bryan and Cherry Alexander / Qaggiq (large communal igloo for feasts) built from ice near Igloolik. Nunavut, Canada, 1999.

Uri Golman / Portrait of an Arctic Snow Hare (Lepus Arcticus Groenlandicus) North East Greenland. February 2009.

Bryan and Cherry Alexander / Kosta, a Selkup man, returns to a winter camp after hunting Capercaille, Krasnoselkup, Yamal, Western Siberia, Russia 2012

Bryan and Cherry Alexander / Ivan Agichev, an elderly Selkup man, out in the forest in the winter. Krasnoselkup, Yamal, Western Siberia, Russia 2012

Bryan and Cherry Alexander / Gennadiy Kubolev, using a traditional Selkup shovel to remove pieces of ice from the water while checking a fishing net in a frozen river, Krasnoselkup, Yamal, Western Siberia, Russia 2012

Bryan and Cherry Alexander / Kosta, a Selkup hunter, setting a trap to catch sable in the forest in winter. Krasnoselkup, Yamal, Western Siberia. Russia 2012

Bryan and Cherry Alexander / Chukchi reindeer herder iced up at -30 C during winter. Chukotskiy Peninsula, Chukotka, Siberia, Russia, 2010. 40 BELOW bookplate.

Bryan and Cherry Alexander / Truck covered in snow by winter snow storms in Igloolik, Nunavut, Canada, 1990.

Bryan and Cherry Alexander / Igloo-shaped church in Iqaluit, Baffin Island, Nunavut, Canada, 1987.