article_snippet.sent: The scientists believe that another Daspletosaurus, which could grow to nine metres (30ft) as adults and weigh up to four tons, fed on the youngster's body.
article_snippet.sent: Tyrannosaurus rex and the youngster's body relatives were more intelligent than previously thought and hunted in gangs which included young and older members, researchers have claimed.
article_snippet.sent: Scientists believe Scientists have evidence that the top predatory dinosaurs were highly intelligent pack animals, despite T-rex being popularly depicted as a dangerous but dim-witted loner.
article_snippet.sent: This is a myth that has grown up because for many years the top predatory dinosaurs were highly intelligent pack animals, despite T-rex being popularly depicted as a dangerous but dim-witted loner fossil skeletons tended to be found on the top predatory dinosaurs were highly intelligent pack animals, despite T-rex being popularly depicted as a dangerous but dim-witted loner own, researchers say.
article_snippet.sent: The new theory follows an analysis of skeletons of the tyrannosaur Tarbosaurus bataar from 90 sites in the Gobi Desert, Mongolia.
article_snippet.sent: Tarbosaurus, a cousin of T-rex that lived around 70 million years ago, was a two-legged predator up to 12 metres long and weighing five tonnes.
article_snippet.sent: Daspletosaurus, which means 'frightful lizard', is thought to be a close relative of the more famous Tyrannosaurus rex and roamed north America between 77 million and 74 million years ago.
article_snippet.sent: With a massive, heavy skull that could be more than 3ft (1 metre) in length, it would have had a powerful bite and probably preyed on large armoured ceratopsid dinosaurs.
article_snippet.sent: The dinosaur latest study was thought to be a juvenile, measuring just under 19.7 feet (6 metres) and weighed around half a tonne.
highlights_snippet.sent: Tyrannosaurus rex - found to be  
highlights_snippet.sent: Tyrannosaurus rex - found to be  was found in Dinosaur Provincial Park in Alberta, Canada, in 1994 .
  
highlights_snippet.sent: Tyrannosaurus rex - found to be  also carried wounds that appeared to have been inflicted during battles .