Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
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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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A group of kittens is called a "kindle".
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When cats are happy, they may squeeze their eyes shut.
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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 a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
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The desire to squeeze and hug cute things comes from the same place in your brain as aggression.
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