In 2008, a fossil hunter named Frank Hadfield went for a walk among the hoodoos of Drumheller, Alberta. Up on one of these chunky sandstone minarets studding the southern Albertan badlands, Hadfield spied what appeared to be the remains of a small carnivorous dinosaur. He made a few calls and soon his colleague Francois Therrien, a paleontologist at the nearby Royal Tyrrell Museum of Paleontology, to come have a look.