Charles Darwin, English naturalist, c 1870s.
© Science Museum / Science & Society Picture Library
Carte de visite photograph taken by Ernest Edwards of Baker Street, London. Darwin (1809-1882) started his career on board the HMS 'Beagle' and spent six years surveying the South American seas. He is remembered for his momentous contributions to biology and as the originator of the theory of evolution. His most famous work, 'The Origin of the Species by Means of Natural selection', was published in 1859.