Jane Burton / Baby Grey Squirrel (Sciurus carolinensis) 'kissing' a tabby kitten.
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Mark Taylor / Brown and black-and-white Shih-tzu puppies 'kissing'.
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Ann & Steve Toon / Male and female Ground squirrels (Xerus inauris) interacting, Kgalagadi Transfrontier Park, Northern Cape, South Africa, February.
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Anup Shah / Western chimpanzee (Pan troglodytes verus) infant male 'Flanle' aged 3 years acting aggressively towards alpha male 'Foaf' aged 30 years who then 'kisses' him on the forehead to diffuse the situatio...
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Bryan and Cherry Alexander / Albina Rocheva, a Nenets girl, kisses one of her family's pet reindeer calves. Nadym Tundra, Yamal, Western Siberia, Russia. 2000
