A zoo in China gave a gay penguin couple the opportunity to raise a chick.
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When dragonflies mate, their tails form a love heart.
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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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Dolphins have names for one another.
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A couple had their wedding rings engraved with a waveform of their own voices saying "I do."
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When cats are happy, they may squeeze their eyes shut.
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