The largest Tyrannosaurus rex fossil ever found has been unveiled - and experts say the fearsome dinosaur lived a long and "violent" life.
The T-rex's remains were unearthed in Canada and a study found the dinosaur - nicknamed Scotty after a celebratory bottle of scotch - lived 66 million years ago.
Scotty weighed almost nine tonnes (8,800 kilograms) and measured 42 feet (13 metres), making it bigger than any other carnivorous dinosaur, and it had a number of battle scars.
The T-rex was first discovered in the province of Saskatchewan near the Canada-US border in 1991, but it took a decade to carefully remove the fossil which was entombed in sandstone.
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Scott Persons, a University of Alberta paleontologist who led the study, said: "This is the rex of rexes.
“There is considerable size variability among Tyrannosaurus. Some individuals were lankier than others and some were more robust.
"Scotty exemplifies the robust. (He) comes out a bit heftier than other T-rex specimens.”
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Paleontologist were only recently able to study Scotty after piecing together the bones like a jigsaw puzzle.
Scotty is the oldest T-rex ever discovered.
Experts believed the dinosaur was in its early 30s when it died.
Mr Persons said: “By Tyrannosaurus standards, it had an unusually long life. And it was a violent one.
"Riddled across the skeleton are pathologies - spots where scarred bone records large injuries.”
Scotty's injuries include broken ribs, an infected jaw and what may be a bite from another T-rex on its tail.
Nizar Ibrahim, a paleontologist at the University of Detroit Mercy who wasn't involved with the study, told National Geographic: “It was not an easy life, even for the king of predatory dinosaurs, judging by all these injuries."
It is the largest terrestrial predator known to science, Mr Persons added.
The study was published in The Anatomical Record.
Scotty's skeleton, which is 65 per cent complete, will now go on display at the Royal Saskatchewan Museum in Regina in May.
It claimed the title of the largest T-rex ever found from Sue, a T-rex on display at the Field Museum of Natural History in Chicago.
Sue had a 40.5-foot-long (12 metres) skeleton.
The ferocious T-rex roamed what is now western North America, where a number of incomplete specimens have been discovered.
It was one of the largest meat-eating dinosaurs with a giant head and mouth filled with jagged teeth.
It is believed the dinosaurs, which had small two-fingered forearms, were about 40 feet long and 20 feet tall.
Earlier this month, it was announced the first ever bird fossil with an egg preserved inside the body had been discovered.
The "incredibly well preserved" find, dating back to the time of the dinosaurs, was found in 110-million-year-old deposits in China.
But scientists said the egg may have killed the 'mother bird'.
