Helena Alexandrovna Timofeeff-Ressovsky (June 21, 1898 – April 29, 1973) was a Russian biologist known for her work in developmental and population genetics and radiation ecology.
Official reluctance to let the couple leave Russia and enter Germany were overcome in part due to Helena's German ancestry.
[6] A number of other Russians, including Sergei R. Zarapkin and his family, technical assistant Natalie Kromm, and the Timofeeff-Ressovskys' nanny, were in residence at the Institute.
[7] Berlin was a comfortable place for women in the sciences: Cécile and Marthe Vogt, Estera Tenenbaum, Stella Rose, Rosa Schragenheim, Irmgard Leux, and Gertrud Soeken also worked at the Institute.
[14] Helena once more worked as a researcher in a department headed by her husband, first in the Urals and then, for the last decade of her life, the Institute of Medical Radiology near Moscow.
[17] The Max Delbrück Center for Molecular Medicine hosts a lecture series named in Helena's honor.