Albertosaurus is a Tyrannosauroid, but of a different genus than its better known cousin, Rex.

The Albertosaurus had puny arms. The purpose of these stunted appendages eludes paleontologists.

Albertosaurus derives its name from the site where it was discovered in 1884 - Horseshoe Canyon in Alberta, Canada.

Some scientists have speculated that Albertosaurus' diminished arm size was due to the need to balance the weight from its enormous jaw muscles.