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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Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
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Blue whale arteries are large enough for humans to swim through and their hearts are the size of cars.
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A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
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Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
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