Ernst Haeckel, comparing natural forms for his “Beauty-album of Nature.” If you haven’t seen Proteus yet, you really should – as well as telling the story of Haeckel’s life, David Labrun turns Haeckel’s many drawings of radiolarians into animated flashes of beautiful things evolving into a multitude of new shapes.
This image was found via ASIFA-Hollywood Animation Archive, which I found via Olsen Ross. Follow the links around the bottom of the Animation Archive entry and you’ll find treasure.