It can be hard for children to understand vast periods of time, but Time Trials is an original new series that takes a look back across time in a highly visual way, to give a better understanding. This book takes the reader from over 200 million years ago, when tiny Saltopus hopped around in search of food, and pterosaurs took to the skies, through to huge dinosaurs such as Brachiosaurus and Allosaurus of the late Jurassic Period. They will travel right up to the mass extinction event of the Cretaceous Period, which wiped out three quarters of all life on the planet. A timeline of discovery concludes the book.