Paleontologists discover world's heaviest Tyrannosaurus rex

Olive Hawkins
March 30, 2019

No big deal or anything, but Canada, the world's largest T. rex was discovered in Saskatchewan. When the researchers measured Scotty's bones, they found the dinosaur was about 42 feet long and weighed almost 20,000 pounds.

The research team found the Fossil, evaluates its size as a hint, that the true extent of the dinosaurs could be underestimated. The study was published online March 21 in the journal The Anatomical Record.

"This is the rex of rexes", said Scott Persons, lead author of the study and postdoctoral researcher in the Department of Biological Sciences.

"There is considerable size variability among Tyrannosaurus", Persons said. Some individuals were lankier than others and some were more robust.

The very big skeleton was first discovered in 1991 near the town of Eastend in Canada.

Scotty has been known to scientists since 1991, but it's taken more than two decades to dig the creature from the Earth because its bones were cemented into the hard rock, making it hard to extract. They named it for the celebratory scotch that was imbibed on the night Scotty was discovered.

Scotty is also the longest-living known T. rex, estimated to have died in its early 30s, with the battle scars to prove it. "By which I mean, it would have had the most candles on its last birthday cake".

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Why it matters: "The find suggests that large predatory dinosaurs probably got older and bigger than paleontologists would have surmised based on now available fossils". Clocking in at a whopping 19,500 pounds, scientists estimate that this particular dinosaur lived to the ripe old age of at least 28 years old.

There's an ongoing debate regarding how T. rexes lived, and it's possible that these huge animals were more comfortable sampling dead carcasses rather than preying for their own meals. Researchers say that as reptiles which grew incredibly fast, these dinosaurs may have ended their lives relatively young. Scotty's skeleton shows signs of broken ribs, an infected jaw, and what might have been a bite from another T. rex on its tail.

The lack of other similarly sized T. rex fossils suggests most other dinosaurs did not live long enough to reach their full growth potential.

"This is the rex of rexes", Persons said in a statement. "Riddled across the skeleton are pathologies - spots where scarred bone records large injuries".

Scotty will be on public display at the Royal Saskatchewan Museum in Regina, Saskatchewan, this May.

"I think there will always be bigger discoveries to be made", Dr Persons said.

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