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Albertosaurus (meaning "lizard from Alberta") was a genus of Tyranosaurid dinosaur that lived in the Western part of North America, during the late Cretaceous period, approximately 70 million years ago. It is believed that Albertosaurus which lived a few million years earlier and was also a carnivore, may have been an early ancestor of Tyrannosaurus.
Although it was smaller than Tyrannosaurus, Albertosaurus was equally terrifying to its prey, as it was a large Theropod (carnivore), with long, serrated teeth in its massive head. This dinosaur measured nearly 30 feet tall and about 11 feet at its widest point.
Albertosaurus walked on two legs which had three toes on each foot. It had short, relatively useless arms with two fingers on each one. It also had a long tail that provided its balance and also helped the dinosaur while turning. Albertosaurus had thick, muscular legs which enabled it to run extremely fast, similarly to that of a T-rex. However, whereas T-rex's heavier body mass made it more susceptible to serious injury or fatality if it were to fall in full stride, Albertosaurus had a higher chance to recover if it were to fall.
