“The Einstein Theory of Relativity” is a silent animated film made in 1923 that tried to explain Einstein’s work to the general public.
It was produced by Fleischer Studios, best known for their delightful Betty Boop cartoons.
Mark Frauenfelder is the founder of Boing Boing and the editor-in-chief of MAKE and Cool Tools. Twitter: @frauenfelder. His new book is Maker Dad: Lunch Box Guitars, Antigravity Jars, and 22 Other Incredibly Cool Father-Daughter DIY Projects