In August 1991, Robert Gebhardt was a high school principal.
He joined Royal Saskatchewan Museum palaeontologists on a prospecting expedition.
They went to the exposed bedrock along the Frenchman River Valley in southwest Saskatchewan, Canada.

Gebhardt discovered the base of a  worn tooth, and a vertebra from the tail.
Both looked like they belonged to a T. rex.

In June 1994, RSM palaeontologists began excavating the T. rex.
The 66-million-year-old skeleton was the first T. rex skeleton found in Saskatchewan and one of only 12 known in the world at the time.
Scotty is one of the largest and most complete skeletons with almost 70% of the skeleton found.
A complete articulated cast of the skeleton was finally completed in 2012 and is now on display at its permanent home at the T.rex Discovery Centre in Eastend, Saskatchewan, Canada.

Scotty's skull has a scar from the eye socket to the nostril.
That was probably caused by another T. rex or large carnivore that gripped Scotty's skull in its jaws.
The museum staff think this is the biggest T. rex specimen found.
It weighed about 8,870 kg (8.87 tonnes).
 Scotty was perhaps in its early thirties at the time of  death, and was 13 m (43 ft) long, including tail.
In August 1991, Robert Gebhardt was a high school principal. He joined Royal Saskatchewan Museum palaeontologists on a prospecting expedition. They went to the exposed bedrock along the Frenchman River Valley in southwest Saskatchewan, Canada. 
Gebhardt discovered the base of a  worn tooth, and a vertebra from the tail. Both looked like they belonged to a T. rex. 
In June 1994, RSM palaeontologists began excavating the T. rex. The 66-million-year-old skeleton was the first T. rex skeleton found in Saskatchewan and one of only 12 known in the world at the time. Scotty is one of the largest and most complete skeletons with almost 70% of the skeleton found. A complete articulated cast of the skeleton was finally completed in 2012 and is now on display at its permanent home at the T.rex Discovery Centre in Eastend, Saskatchewan, Canada. 
Scotty's skull has a scar from the eye socket to the nostril. That was probably caused by another T. rex or large carnivore that gripped Scotty's skull in its jaws. The museum staff think this is the biggest T. rex specimen found. It weighed about 8,870 kg (8.87 tonnes).  Scotty was perhaps in its early thirties at the time of  death, and was 13 m (43 ft) long, including tail.
Tyrannosaurus