When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
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Dolphins have names for one another.
18
Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
26
Rex the German Shepherd was a rescue dog with a bad temper. He refused to be fed by humans and would attack strangers, but he’s a changed dog after falling in love with Geraldine the goose!
10
When cats are happy, they may squeeze their eyes shut.
10
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
The desire to squeeze and hug cute things comes from the same place in your brain as aggression.
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