Illustrates “How Long The Dinosaurs Lived Compared to US”. Compares the Mesozoic Era or “The Age of the Dinosaurs” (including the Triassic Period, The Jurassic Period and The Cretaceous Period) that ended approximately 65 million years ago in a mass extinction when an asteroid wiped out all the Dinosaurs except birds, to “The Cenozoic Era” which includes “The Age of Humans”. 12" x 45".