Above: The gigantic Tyrannosaurus rex fossil known as 'Sue' is now housed at the Chicago Field Museum, USA. The Museum famously won the bid for the bones, paying US $8.4m - the largest sum ever exchanged for a fossil, making 'Sue' a record breaker in every sense. 'Sue' is not a Jurassic specimen as many assume: rather, she is believed to have died at the end of the Cretaceous Period, possibly the victim of another tyrannosaur aggressor Her discovery has greatly influenced the way in which palaeontologists perceive the movement and behaviour of these beasts. The fossils of 'Sue' were the subject of a protracted legal ownership battle between the landowner. the expedition sponsors, and the leading fossil-diggers.