In today's world, there are few animals that weigh in at a ton or more. But millions of years ago, massive creatures roamed the earth. This fascinating and educational coloring book focuses on the bigger, taller, and heavier mega dinosaurs that scientists are constantly bringing to light. Along with recently discovered species, it features old favorites like the mighty Tyrannosaurus rex. Each of the 44 illustrations includes descriptive captions plus a small silhouetted image of the dinosaur that compares its size to that of a human being.