signed
1870
by Charles Darwin
1870. Our first Darwin signed photograph in all these yearsCharles Darwin, English naturalist whose scientific theory of evolution by natural selection became the foundation of modern biology and evolutionary studies. Darwin's explanation for the great unfolding of life through time - evolution by natural selection - transformed our understanding of the living world, and focused attention on the cumulative inherited change in a population of organisms through time leading to the appearance of new forms: the process by which new species or populations of living things develop from preexisting forms through successive generations. Darwin revolutionized (truncated)