A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
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A group of pugs is called a grumble.
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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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When cats are happy, they may squeeze their eyes shut.
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When dragonflies mate, their tails form a love heart.
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Sergeant Stubby was the only war dog to be promoted to sergeant through combat in WWI. He saved his regiment from surprise mustard gas attacks, found and comforted the wounded, and even once caught a German spy by the seat of his pants, holding him there until American Soldiers found him.
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