How to breathe like a dolphin

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Danish marine biologist Stig Severinsen has been called the Human Dolphin and The Man Who Doesn't Breathe. Little wonder – in 2012 he broke a world record by spending 22 minutes underwater on a single breath of air. It's very different from the more active free diving he usually does. Photo: Stig Severinsen holding his breathe underwater Credit: Getty Images