Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
When dragonflies mate, their tails form a love heart.
22
Squirrels will sometimes adopt orphaned baby squirrels that they’re related to.
12
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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When cats are happy, they may squeeze their eyes shut.
10
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
Sea otters hold hands while sleeping so they don’t drift away from each other.
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