Albertasaurus is a genus of theropod dinosaur that lived during the Late Cretaceous period, around 75 million years ago, in what is now Alberta, Canada. It is a close relative of the more famous Tyrannosaurus rex and is known for its large size and sharp teeth. Fossils of Albertasaurus provide insights into the ecology and behavior of predatory dinosaurs during its time. The dinosaur is considered a significant part of Canada's paleontological heritage.