In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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One litter of kittens can be produced by more than one father.
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A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
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Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
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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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Dolphins have names for one another.
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Some British police cars carry a teddy bear to console children after an accident.
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A new born kangaroo is small enough to fit in a spoon!
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