In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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A group of pugs is called a grumble.
10
Sea otters hold hands while sleeping so they don’t drift away from each other.
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A group of kittens is called a "kindle".
10
Squirrels will sometimes adopt orphaned baby squirrels that they’re related to.
12
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
When cats are happy, they may squeeze their eyes shut.
10
One litter of kittens can be produced by more than one father.
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