Animation is the illusion of movement created by displaying a sequence of static images. The earliest known animation dates back to Greek mythology. Émile Reynaud created the first animated film in 1892 using praxinoscope. Walt Disney revolutionized animation with feature-length films like Snow White and the Seven Dwarfs in 1937. There are several types of animation including 2D, 3D, stop motion, and motion graphics. Animation is used widely in advertising, movies, gaming, education and more. Key principles like squash and stretch help create realistic movement. Famous animators include Walt Disney, Tim Burton, and Chuck Jones.