Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
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When dragonflies mate, their tails form a love heart.
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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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A group of kittens is called a "kindle".
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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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