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And for our last news item today, a special report from Diane Hassan on an animal that is rapidly becoming known as 'man's best friend', the dolphin. Diane: Last week, a twenty-eight-year-old diver who went swimming in the Red Sea with a group of dolphins learnt the hard way just how caring these creatures can be. When the diver was suddenly attacked by a shark, they saved him by forming a circle around him and frightening the shark away.

It's not the first time such a rescue has happened and it's been known for some time that dolphins will do for humans what they do for their own kind. They are, in fact, the only animals in the world whose brains match ours in terms of size, and their intelligence and ability to feel emotion continue to fascinate scientists and doctors alike. For some time now, their healing powers have been well known. A swim with a group of dolphins, for example, is a recognised 'medical' activity for everyday problems such as stress. But some dolphins are playing a far more serious medical role for us than that.