Albertosaurus (AL-bert-OH-saw-RUS Meaning "Lizard from Alberta") was a tyrannosaurid theropod dinosaur that lived in the Late Cretaceous Period. It was found in Alberta, Canada and was discovered by Osborn in 1905. Albertosaurus was smaller than Tyrannosaurus rex. It was a carnivore and their prey item was Pachyrhinosaurus.
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