Physiologist, biologist who was the first in the world to discover dependency function of the biological clock in the brain of mammals on the length of the day during the seasons, but also a scout. This is the former President of the Academy of Sciences of the Czech Republic, Helena Illnerová, whose life is closely linked to the Institute of Physiology, where she began her scientific career in 1961. One of the episodes of the documentary series Babylon, which premiered on Czech Television on 28 October 2023, is dedicated to her.