The Upper Cretaceous period ushered in a time of incredible change on Earth. The end of this period saw a mass extinction event that destroyed all of the dinosa
The Upper Cretaceous period ushered in a time of incredible change on Earth. The end of this period saw a mass extinction event that destroyed all of the dinosa
Introduces the spinosaurus, describes in graphic novel form a day in its life from breakfast to dinner, and provides information on spinosaurus fossils and the
Readers get a detailed look at the landscapes and creatures of the Lower Cretaceous period and the dramatic changes of life on Earth during that time. They expl