Ernst Haeckel, German naturalist, c 1860s.
© Science Museum / Science & Society Picture Library
Carte de visite photograph of naturalist Ernst Haeckel (1834-1919). Born in Potsdam, Haeckel became profesor of zoology at the University of Jena in 1862. One of the principal supporters of Charles Darwin's theories of evolution in Germany, he wrote broad-ranging books addresed to the general public and his illustrations inspired many artists. He is famous for his belief that the development of the individual recapitulates an organism's evolution ('Ontogeny repeats phylogeny').