Today's story: Orcas are the largest type of dolphin, and they're known for their intelligence. A recent study proves they are more clever than previously thought. Researchers captured video of orcas using kelp to groom each other. The behavior shows not only tool use, but also cooperation between individuals—a rare behavior for animals that live in the sea.Transcript & Exercises: https://plainenglish.com/790Full lesson: https://plainenglish.com/790 --Plain English helps you improve your English:Learn about the world and improve your EnglishClear, natural English at a speed you can understandNew stories every weekLearn even more at PlainEnglish.com-- Mentioned in this episode:Ready to improve your listening?Ready to listen fast? Improve your listening with the fast version of this and every episode. The full-speed version is a fresh recording and it sounds just like someone speaking to a native speaker (with no AI or computer manipulation!) You can even listen on a podcast app

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