Say it ain’t so, Sue! Researchers from the Field Museum have discovered a huge predator that roamed North America before the T. Rex. We talk to Dr. Peter Mackovicky about his impressive find. (Photo: flickr/allisonmeier)
Say it ain’t so, Sue! Researchers from the Field Museum have discovered a huge predator that roamed North America before the T. Rex. We talk to Dr. Peter Mackovicky about his impressive find. (Photo: flickr/allisonmeier)