The Rex of Rexes

Meet Scotty, he’s the world’s biggest known Tyrannosaurus Rex, one of the most fearsome carnivores of all time. Scotty lived about 66 million years ago (Cretaceous period) in what is now Saskatchewan, Canada.

Scotty is the largest dinosaur skeleton ever found in Canada. Image credit: Amanda Kelley.


Scotty was 42.7 feet (13 m) long and weighed approximately 19,555 lbs (8,870 kg)!

The large, relatively complete (roughly 65%) skeleton was found in a layer of the Frenchman Formation near Eastend, Saskatchewan in 1991. Only recently, after several more years piecing together the specimen like a jigsaw puzzle, that paleontologists have been able to study the specimen.

There is a lot size variability among Tyrannosaurus. Some individuals were lankier than others and some were more robust. Scotty was clearly on the robust side. He comes out a bit heftier than other T-Rex specimens.

Scotty is also the oldest known T-Rex, meaning he would have had the most candles on its last birthday cake. Scientists can get an idea of how old a dinosaur is by cutting into their bones and studying the growth patterns. Scotty is all old growth.

Age is relative though, and T-Rexes grew fast and died young. Scotty was estimated to have been in its early 30s when he died. By Tyrannosaurus standards, he had an unusually long life. And it was a violent one. Riddled across the skeleton is scarred bone which record large injuries.

Among Scotty’s injuries are broken ribs, an infected jaw and what may be a bite from another T-Rex on its tail, battle scars from a long life.

Tyrannosaurus Rex is the largest terrestrial predator known to science.