By Robin Sissons
Gorgosaurus is a large theropod dinosaur closely related to Albertosaurusand Tyrannosaurus. It was a top predator in its ecosystem, and would have interacted with other dinosaurs such as Centrosaurus and Parasaurolophus, as well as the similarly-sized tyrannosaur Daspletosaurus. At 8 to 9 meters long, a smaller animal than its more famous cousins, Gorgosaurus was none the less still a formidable carnivore who would have prowled the ancient ecosystems of Alberta 76 million years ago during the Cretaceous.