Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
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Sea otters hold hands while sleeping so they don’t drift away from each other.
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One litter of kittens can be produced by more than one father.
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Meysi is one of the world's smallest dogs, measuring in at just 7cm tall, 12cm long, and weighing a meagre 250 grams (only slightly heavier than a hamster!)
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Sergeant Stubby was the only war dog to be promoted to sergeant through combat in WWI. He saved his regiment from surprise mustard gas attacks, found and comforted the wounded, and even once caught a German spy by the seat of his pants, holding him there until American Soldiers found him.
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Some British police cars carry a teddy bear to console children after an accident.
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There's a young hippo and a 130+ year old tortoise in a Kenyan wildlife preserve who are best friends and they even sleep and play together.
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