Darwin and The Origin of Species

Great set of pictures, via the Guardian.

Darwin at age 31 in 1840, recently married, a dignified young naturalist with a secret theory about evolution. Portrait of Darwin, 1840, by George Richmond, ©Darwin Heirlooms Trust, courtesy of the English Heritage Photo Library

A grand old man of science. Darwin aged 71, photographed a year before his death in 1882. Photograph by Julia Margaret Cameron, 1881, ©Private