A group of pugs is called a grumble.
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A group of kittens is called a "kindle".
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When dragonflies mate, their tails form a love heart.
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In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
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One litter of kittens can be produced by more than one father.
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Holding hands with someone you love can alleviate physical pain as well as stress and fear.
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