Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
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Ants have tiny magnetic compasses in their antennae which help them navigate.
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The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
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The Hercules beetle, despite weighing only 100 grams, can lift 8 kilograms, making it one of the proportionally strongest animals in the world.
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Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
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Sharks have been on the planet longer than trees.
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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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