Dolphins have names for one another.
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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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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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Raj from the Big Bang Theory is married to Miss India.
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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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Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
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