James Franck (1882-1964) was one of the twentieth century's most respected scientists, known both for his contributions to physics and for his moral courage. During the 1920s, Franck was a prominent figure in the German physics community. His research into the structure of the atom earned him the Nobel Prize in Physics in 1925. After the Nazis seized power in 1933, Franck resigned his professorship at Gottingen in protest against anti-Jewish policies. He soon emigrated to the United States, where, at the University of Chicago, he began innovative research into photosynthesis. When the Second...