Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
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The head of a jellyfish is called the "Bell."
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Dogs sometimes fake being sick to get attention.
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Jellyfish as a species are actually older than dinosaurs and sharks.
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Queen ants have one of the longest life-spans of any known insect - typically up to 30 years. Western harvester ant queens can live up to 40 years!
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