The bestselling I Wonder Why series has the answers to all the questions you've ever wanted to ask about the natural world, history, space, and more! Which was the biggest dinosaur? Why did dinosaurs eat stones? How are dinosaur fossils found? Which dinosaur had body armor? Fresh, colorful new illustrations pair with the tried and trusted question-and-answer format to create an essential resource for home, schools, and libraries. The information is presented in bite-sized nuggets, making it ideal for reading aloud and perfect for stimulating discussion between child and parent or educator.