"Introduces readers to the study of dinosaurs and the history of life on Earth as revealed by fossils. Through hands-on projects, vocabulary boxes, and high-interest content, children discover how fossils form and learn about the landscape and the plants and animals that lived long ago. Scientists use radiometric dating to test these fossils to discover when they were made, what organisms made them, what those organisms used for energy, what killed them, and a whole lot of other information."--Page 4 of cover.