Being Giant: Why are Mammals Not as Big as Dinosaurs? 

Royal Tyrrell Museum Speaker Series 2015
Dr. Jessica Theodor - University of Calgary Being Giant: "Why are mammals not as big as dinosaurs?" A presentation by Dr. Jessica Theodor, Associate Professor in the Department of Biological Sciences at the University of Calgary, entitled “Being Giant: Why are mammals not as big as dinosaurs?”
Originally published January 12, 2015.