Albertosaurus was a slightly older relative to the Tyrannosaurus. Tyrannosaurus roamed the earth between 70 and 65 million years ago whilst Albertosaurus lived in North America in the late cretaceuous period between 75 and 70 million years ago.

Albertosaurus was a large theropod dinosaur, measuring up to 30 feet (9 meters) in length and weighing around 2.5 to 4 tons. Like its more famous relative, Tyrannosaurus rex, Albertosaurus had a massive head with sharp, serrated teeth up to 6 inches (15 cm) long. Its robust hind limbs and tail counterbalanced its heavy head, making it an efficient predator.

It was a bipedal carnivore with two-fingered hands and a thin bone plating that covered some of its skull openings. It had a narrower skull than it´s successor Tyrannosaurus and also it´s eyes were more on the sides. In front of Albertosaurus´s eyes there was two small horns which is speculated to have some sort of mating purpose, designed to attract mate. Albertosaurus also possessed binocular vision, thanks to its forward-facing eyes, which allowed for precise depth perception, essential for an active predator.

It was a relatively small tyrannosaurid even though it was estimated to grow up to 26 feet or 8 meters in length. It´s size and structure made it probably more fast and agile compared to Tyrannosaurus or other larger tyrannosaurids.