Have you ever seen an elephant in a zoo? You know they are very big and can weigh as much as a school bus! Millions of years ago there was a dinosaur on Earth called Brachiosaurus. One Brachiosaurus weighed as much as 17 elephants! Can you imagine how big some dinosaurs must have been? In this book, readers explore a world where dinosaurs roam. And learn fascinating facts about dinos along the way.