Ernst Haeckel
"Stephoidea"
1904
Lithograph
"A key has no logic to its shape. Its logic is: it turns the lock."
-G.K. Chesterton
Ernst Haeckel
"Prosobranchia"
1904
Lithograph
Photo credit: via Wikipedia Commons, from Ernst Haeckel's "Kunstformen der Natur" ("Art Forms of Nature")
