Albert Einstein developed his theory of special relativity in 1905, and then mentally mapped out his theory of general relativity between 1907 and 1915. For years to come, the rest of the world would try to catch up with Einstein, trying to understand the gist, let alone the full implications, of his groundbreaking ideas.

Above, you can watch one such attempt. Produced by Max and David Fleischer, best known for their Betty Boop and Superman cartoons, The Einstein Theory of Relativity used the power of animation to explain relativity to a broad, non-scientific audience in 1923.