This link leads to the story by Rebecca Morelle entitled, "Colossal pliosaur fossil secrets revealed by CT scanner". Learn more at that video link provided.
Rhomaleosaurus cramptoni at British Natural History Museum 2005
photo by Niki Odolphie (Frome, England)
The marine reptile known as the Pliosaur existed in the Jurassic and Cretaceous Periods (learn more at this Wikipedia link).