the entire world. The research conducted in the genetics department, along with the permanent seminar on genetics organized by Timofeev-Resovskij, drew many young postdoctoral researchers who would ultimately become prominent scientists and the department gained the status of an institute; while Timofeev-Resovskij remained a citizen of the Soviet Union for his entire stay in Germany, his status and that of his department were recognized by the fact that he was appointed, in 1938, to the position of scientific member of the Kaiser-Wilhelm Gesellschaft. Timofeev-Resovskij's colleagues in his department included his wife Elena Aleksandrovana Timofeeva-Resovskaja, his Russian colleague Sergei Tsarapkin, the physician and radiation biologist Alexander Catsch (Katsch), the radiochemist Hans-Joachim Born, and the physicist and radiation biologist Karl Zimmer; a technical assistant, Natasha (Natalie) Kromm, was from Russia. Timofeev-Resovskij also collaborated with other eminent scientists including the nuclear chemist Nikolaus Riehl, who was the scientific director of the industrial corporation Auergesellschaft and the biophysicist Max Delbrück, who had studied physics under Niels Bohr and Max Born. Others drawn to Timofeev-Resovskij's department who would go on to become prominent scientists included Hans Bauer and Andriano Buzzati-Traverso. Through 20 years of collaboration with these and many others, Timofeev-Resovskij authored or coauthored over 100 papers written in German, English, Russian, and French. In addition to those already mentioned, Timofeev-Resovskij's scientific circle included the physicists William Astbury, Niels Bohr, P. A. M. Dirac, Pascual Jordan, and Erwin Schrödinger, and the biologists Torbjörn Caspersson, C. D. Darlington, Theodosij Dobzhans’skij, Boris Ephrussi, Åke Gustafsson, J. B. S. Haldane, Hermann Joseph Muller, Nikolai Vavilov, and Vladimir Vernadsky. Timofeev-Resovskij's second son was born on 9 April 1927. Together with the French geneticist of Russian origin, Boris Ephrussi, and with the generous support of the Rockefeller Foundation, Timofeev-Resovskij organized an annual conference on biophysics, genetics, and radiation biology. This even continued right up to the start of World War II in 1939. In 1932, Timofeev-Resovskij attended the 6th International Congress of Genetics, which was held in Ithaca, New York. While there, he formed a friendly relationship with the plant geneticist Nikolaj Vavilov, who was President of the Soviet Adcademy of Agricultural Sciences. Timofeev-Resovskij stayed in Germany even after Adolf Hitler came to power in 1933. That the Gestapo or the Schutzstaffel (SS) did not give him trouble as a citizen of the Soviet Union is all the more remarkable since Vogt was harassed by the National Socialists for reasons