Are Dolphins Really Smart?

How intelligent are dolphins? Is their communication system really as complex as human language? And are they as friendly and peaceful as they are made out to be?The Western world has had an enduring love affair with dolphins since the early 1960s, with fanciful claims of their 'healing powers' and 'super intelligence'. Myths and pseudoscience abound on the subject. Justin Gregg weighs up the clai...