Animation has a long history dating back 40,000 years with cave paintings depicting movement. Shadow puppetry and Greek vases further advanced animation techniques. The magic lantern and early photography experiments led to the creation of basic animated devices like the zoetrope and mutoscope in the 1830s-1860s. Stop motion photography pioneers like Muybridge and Reynaud developed animation technologies. The 1920s saw the addition of sound to animated films. Walt Disney's Steamboat Willie in 1928 was a breakthrough as the first animated film with synchronized sound. Advances in color, computer graphics, and CGI expanded animation possibilities through today.