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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Crows living in some urban areas drop nuts into traffic to let the passing cars crush them, then they wait for the red lights to stop the traffic so they can grab and eat it.
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Cats recognise the voice of their owner, but never evolved to care.
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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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The oldest creature ever found was Ming the clam at an admirable 507 years old.
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Nicole Kidman is scared of butterflies.
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Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
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