How long was the Seismosaurus? Read this book to find out! Books in this series take the reader on field trips to the most unlikely of destinations! In this title climb aboard a time machine and travel back to the era of the dinosaurs. Our tour will include visits to the Triassic Jurassic and Cretaceous periods and will look at dinosaurs such as Tyrannosaurus Rex Allosaurus and Plateosaurus along the way.