Ernst Haeckel (1834-1919) was a German-born biologist, naturalist, evolutionist, artist, philosopher, and doctor who spent his life researching flora and fauna from the highest mountaintops to the deepest ocean. A vociferous supporter and developer of Darwin’s theories of evolution, he denounced religious dogma, authored philosophical treatises, gained a doctorate in zoology, and coined scientific terms which have passed into common usage, including ecology, phylum, and stem cell. At the heart of Haeckel’s colossal legacy was the motivation not only to discover but also to explain. To do this, he created hundreds of detailed drawings, watercolors, and sketches of his findings which he published in successive volumes, including several marine organism collections and the majestic Kunstformen der Natur (Art Forms in Nature), which could serve as the cornerstone of Haeckel’s entire life project. Like a meticulous visual encyclopedia of living things, H