Ashley Hall is a palaeontologist, naturalist, author, and science communicator based at the Museum of the Rockies in Montana, USA. She excavates, curates, and communicates everything to do with dinosaurs and our prehistoric worlds.
Claire McElfatrick's gorgeous illustrations can be seen in the previous DK titles in this series.

Enter the prehistoric world for an incredible four-billion year journey in this book for young history and dinosaur enthusiasts. Take children on a fascinating journey through history, showing them how and where their favourite dinosaurs came to exist, and how events from billions of years ago are still affecting our natural world today. Packed with dynamic historical content, Prehistoric Worlds combines illustrations and photos to help young historians aged 7-9 learn all about the period that shaped our planet. Meet favourite dinosaurs, from the terrifying T.Rex to the spiky stegosaurus; nurture your inner palaeontologist by learning about prehistoric plant and animal fossils; and discover destructive extinction events that changed the world forever. Inside this dinosaur book for children, you'll find: - A wide range of prehistoric life and its chronology, including plants and animals from this period, and the continental shifts that shaped our world today. - Information on natural history written by palaeontologist and scientist Ashley Hall. - Illustrations and expert CGI imagery showing different types of dinosaur species. Plants flourish, birds evolve, and dinosaurs charge across the pages of this lively and colourful book. From oceans teeming with life to destructive asteroids, children will discover the incredible timeline of prehistoric life that resulted in the world we recognise today.