From giraffes and dinosaurs to owls and crocodiles, find out what makes every skeleton unique. How is a human skeleton different from an animal one? What are bones made from? Look inside human and animal bodies to see the shape of different bones and discover how they have evolved in different ways to help each animal survive, from a bird's light bones full of air spaces to help them fly to crocodile bones growing just under the skin that act as armour. Paleontologists who study animal fossils can sometimes determine a species from as little as just one bone! Fascinating fact panels give extra information about bones uses or record-breaking figures about size or strength. Facts checked by experts from the Natural History Museum.