In 1927, Charles R. Knight painted a mural incorporating "Tyrannosaurus" facing a "Triceratops" in the Field Museum of Natural History, establishing the two dinosaurs as enemies in popular thought; paleontologist Phil Currie cites this mural as one of his inspirations to study dinosaurs. Bakker said of the imagined rivalry between "Tyrannosaurus" and "Triceratops", "No matchup between predator and prey has ever been more dramatic. It's somehow fitting that those two massive antagonists lived out their co-evolutionary belligerence through the very last days of the very last epoch of the Age of Dinosaurs."