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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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!)
11
Sandy, an African Penguin, has been in 'love' with her keeper at the Nuremburg zoo since 1996.
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Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
There was a cable network called The Puppy Channel that, for 3 years, broadcast only broadcast footage of puppies playing.
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