So far Currie and his team of scientists have uncovered parts of 12 Albertosaurus skeletons. “This is a significant site,” says Currie. “It’s one of the only places in the world that shows that these carnivorous, or meat-eating, dinosaurs probably lived in packs.” Evidently they hunted together, too. The dinosaurs ran on strong hind legs and seized their victims with powerful jaws. Because their sharp teeth were good for biting, not chewing, Albertosaurus probably swallowed chunks of meat whole. Most likely, when the dinosaurs could not find any live prey, they devoured dead animals.

Currie puzzles over why so many Albertosaurus died at one time in this place. He may never discover exactly what happened, but he continues to look for more skeletons and clues.

Albertosaurus had a bone-crushing bite. It probably sunk its jaws into plant-eating dinosaurs and wolfed down chunks of meat.

A fully grown adult Albertosaurus measured 25 to 30 feet (7.6 to 9 meters) long, not quite as large as its relative, the fearsome 40-foot-long (12-meter-long) Tyrannosaurus rex.