Dr. Roelof Hut is associate professor Chronobiology at the University of Groningen. His research team studies circadian and seasonal rhythms in insects, mammals and humans. The effect of daylength and light on behavior, sleep-wake timing, mental performance, physiology, reproduction and growth are at the core of our scientific interests. Our work resulted in over 100 scientific publications and many public outreach activities, including national radio and television shows.