Andres M. Dominguez / Heart shaped lip dactylorhiza orchid (Orchis cordigera) in flower, Sierra de Grazalema Natural Park, southern Spain, May.
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Eric Baccega / Portrait of woman from the Mursi tribe, traditionally decorated and painted, wearing a large clay lip plate, Omo Valley, Ethiopia, March 2015.
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Eric Baccega / Portrait of woman from the Mursi tribe, traditionally decorated and painted, wearing a large clay lip plate, Omo Valley, Ethiopia, March 2015.
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Enrique Lopez-Tapia / Woman with lip plate, which signifies she is a married woman, Mursi tribe, Mago National Park. Ethiopia, November 20144
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Donald M. Jones / Moose (Alces alces) bull lip-curling, Denali National Park, Alaska
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Fiona Rogers / Sumatran Orangutan (Pongo abelii) twenty-six year old male, named Halik, biting lip, Gunung Leuser National Park, Sumatra, Indonesia
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Laurent Geslin / Mursi woman with large clay plate in lower lip, showing her age, Omo valley, Ethiopia, 2006
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Laurent Geslin / Young Mursi woman with clay plate in lower lip, holding her Kalashnikov rifle (result of the cold war in Africa), Omo valley, Ethiopia, 2006
Anup Shah / Mature male gelada (Theropithecus gelada) fighting head-on, upper lip curled back revealing teeth. Simien Mountains National Park, Ethiopia.
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Fiona Rogers / Gelada baboon (Theropithecus gelada) sub-mature male showing aggression by lip flipping, Simien Mountains National Park, Ethiopia, November