Few things speak to the soul like a dolphin staring us straight in the eye. Researchers say that once you're in the water with a dolphin, it does a sonar scan of your body. You may feel vibrations and become extremely relaxed and happy.
Scientist David Cole of AquaThought conducts studies of people before and after they interact with dolphins. Cole says the echolocation dolphins use on us can radically improve our immune systems, our brains and our cells.

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