A new study provides insights into the development of leg muscles in dinosaurs. Researchers at the Royal Veterinary College (RVC) in London, in collaboration with Brandon Kilbourne of the Museum für Naturkunde Berlin, scanned fossil bones of dinosaurs and articulating them to create digital skeletons with muscles anatomically positioned over the bones. The results of the simulations and modeling show that the locomotion of birds and their dinosaur ancestors differed significantly and that the locomotion of early dinosaurs was more comparable to mammals, such as humans, rather than birds.