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The skull of a giant sea monster that terrorized the oceans 150 million years ago has been discovered in cliffs in southern England. The marine reptile has been identified as a completely new species of pliosaur and the skull has survived with dozens of razor-sharp teeth with which it once ripped apart the flesh of its victims. Newshour's Julian Marshall asked palaeobiologist Professor Emily Rayfield to describe the unusual find. (Photo: Palaeontologist Steve Etches stands next to the skull of a colossal sea monster. Credit: Â鶹Éç/TONY JOLLIFFE)