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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In 1949, an official boxing match between a bear and a man was held. The bear won.
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The Lion's Mane Jellyfish is the largest jellyfish in the world. They have been swimming in arctic waters since before the dinosaurs (over 650 million years ago).
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There are approximately three chickens for every human on Earth.
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A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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