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 zoo in China gave a gay penguin couple the opportunity to raise a chick.
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One litter of kittens can be produced by more than one father.
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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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