Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
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Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
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In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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When cats are happy, they may squeeze their eyes shut.
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A group of kittens is called a "kindle".
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Some British police cars carry a teddy bear to console children after an accident.
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