Duncan Murrell / Young children from Barangay Tagabinet having a nature walk around Ugong Rock, Palawan, the Philippines.

Karine Aigner / Japanese man playing with cats at the Kawaramati Cat Cafe Kyoto, Japan.

Karine Aigner / Person with lure playing with cats at the Kawaramati Cat Cafe, Kyoto, Japan

Karine Aigner / Tabby cat playing with fish toy at Kawaramati Cat Cafe Kyoto, Japan.

Karine Aigner / Woman with cats at Kawaramati Cat Cafe Kyoto, Japan

Karine Aigner / Cats sitting in window at Kawaramati Cat Cafe, Kyoto, Japan

Guy Edwardes / Aurora Borealis over Sycamore Gap, Hadrian's Wall, Northumberland, England. February 2014

Brent Stephenson / Sunset off Scott Island, with floating pieces of sea ice, Scott Inlet, Baffin Island, Canadian Arctic, August 2015.

Brent Stephenson / Polar bear (Ursus maritimus) mother and large second year cub swim across calm water, Scott Inlet, Baffin Island, Canadian Arctic, August. Vulnerable species.

Brent Stephenson / Young Polar bear (Ursus maritimus) walking across melting sea ice, Scott Inlet, Baffin Island, Canadian Arctic, August. Vulnerable species.

Arne Hodalic / Nenet herdsman with Reindeer (Rangifer tarandus) during summer migration, Yamal Peninsula, Russia. May.

Pete Oxford / Tea picker, collecting Tea leaves (Camelia sinensis) wearing large straw hat, Assam, North East India, October 2014.

Pete Oxford / Konyak Naga boy peering out of house decorated with buffalo skulls, Konyak Naga headhunting Tribe.Mon district, Nagaland, North East India, October 2014.

Pete Oxford / Head-hunted human skulls, collected by the Konyak Naga tribe, North East India, October 2014.

Pete Oxford / Konyak Naga tattooed head hunter. Only someone who has killed and taken a human head can be tattooed in this manner. Mon district. Nagaland, North East India, October 2014.

Pete Oxford / Konyak Naga tattooed Ang or Chief. Only someone who has killed and taken a human head can be tattooed in this manner. Mon district. Nagaland, North East India, October 2014.

Pete Oxford / Konyak Naga tattooed Ang or Chief. Only someone who has killed and taken a human head can be tattooed in this manner. Mon district. Nagaland, North East India, October 2014.

Pete Oxford / Nyshi man, Arunachal Pradesh, North East India, November 2014.

Pete Oxford / Apatani woman with facial tattoos and traditional cane nose plugs / Yapin Hulo made to make them look unattractive to males from other tribes. These facial modifications are now outlawed. Apatani Tr...

Pete Oxford / Woman inside Nyshi Long House, Nyshi Tribe, Arunachal Pradesh.North East India, November 2014.

Constantinos Petrinos / Woman from the Oromo tribe transporting firewood on her back. Oromia Region, Central Ethiopia, Africa, March 2009.

Eric Baccega / Young woman from the Bodi tribe displaying elaborate scarification on the skin of her back, Omo Valley, Ethiopia, March 2015.

Eric Baccega / Young man from the Bodi Tribe having new scars made on his chest with razor blade, to make decorative skin scarifications. Omo Valley, Ethiopia, March 2015.

Eric Baccega / Portrait of woman from the Mursi tribe, traditionally decorated and painted, wearing a large clay lip plate, Omo Valley, Ethiopia, March 2015.

Eric Baccega / Portrait of woman from the Mursi tribe, traditionally decorated and painted, wearing a large clay lip plate, Omo Valley, Ethiopia, March 2015.

Eric Baccega / Toposa tribe man with elaborate facial skin scarifications, Omo Valley, Ethiopia, March 2015.

Eric Baccega / Men from the Mursi tribe decoratively scaring skin, one man scars the arm of another one by lifting the skin with an acacia spine and cutting it with a razor blade, Ethiopia, March 2015.

Eric Baccega / Afar men mining salt at Lake Assale. Danakil depression, Afar region, Ethiopia, March 2015.

Enrique Lopez-Tapia / Karo boys with decorative skin painting. Karo tribe, Omo river, Ethiopia, November 2014

Enrique Lopez-Tapia / Karo boys with decorative skin painting. Karo tribe, Omo river, Ethiopia, November 2014

Enrique Lopez-Tapia / Karo boy with decorative skin painting. Karo tribe, Omo river, Ethiopia, November 2014

Enrique Lopez-Tapia / Karo boys with decorative skin painting, close up portrait, Karo tribe, Omo river, Ethiopia, November 2014

Enrique Lopez-Tapia / Dassanech baby with her headdress made from bottlecaps, Lower Omo Valley. Ethiopia, November 2014

Enrique Lopez-Tapia / Woman with stick at the Jumping of the bulls Hamer ceremony. This Hamer ceremony, is a right of passage into manhood for Hamer boys. During the ceremony young female relatives of the boys beg to be wh...

Enrique Lopez-Tapia / Hamer women in traditional clothing at the Jumping of the bulls ceremony. Ethiopia, November 2014

Enrique Lopez-Tapia / Karo boys with decorative skin painting.Territory of the Karo tribe. Omo river. Ethiopia, November 2014

Enrique Lopez-Tapia / Woman with lip plate, which signifies she is a married woman, Mursi tribe, Mago National Park. Ethiopia, November 20144

Kristel Richard / Eagle hunter mounted on Mongolian horse with his female Golden eagle (Aquila chrysaetos) at Eagle Hunters Festival, near Sagsai, Bayan-Ulgii Aymag, Mongolia. September 2014..

Kirkendall-Spring / Prayer flags covering the side of Kuendeying Bazzam Bridge over the Wang Chhu in Thimphu. Bhutan, October 2014.

Kirkendall-Spring / Doorway of the poet Dilgo Khyentse Rinpoche's house, near Paro, Bhutan, October 2014.

Dong Lei / Group of local children smiling, near Lantsang Mekong river, Kawakarpo Mountain, Meri Snow Mountain National Park, Yunnan Province, China.

Eric Baccega / Portrait of Naro San Bushman with leather headdress made of duiker skin, Kalahari, Ghanzi region, Botswana, Africa. October 2014.

Eric Baccega / Portrait of Naro San Bushman with leather headdress made of duiker skin, Kalahari, Ghanzi region, Botswana, Africa. October 2014.

Eric Baccega / Naro San Bushmen sitting in front of their hut, Kalahari, Ghanzi region, Botswana, Africa. Dry season, October 2014.

Eric Baccega / Naro San Bushman hunting in the bush with traditional bow and arrow, Kalahari, Ghanzi region, Botswana, Africa. Dry season, October 2014.

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....

Bryan and Cherry Alexander / Grisha (right) and Gosha Vanuitto, Nenets reindeer herders, at their winter camp on the tundra in the South Tambey Gas Field, Yamal Peninsula, Siberia, Russia. February 2014.