Diploma in biology, Ruhr University, Bochum, Germany, 1974. Doctor of Philosophy, Ruhr University, Bochum, Germany, 1977. Habilitation in animal physiology, University Marburg, Germany, 1988.
Research assistant, Max-Planck-Institute, Bad Nauheim, Germany, 1977-1983; stipendiat, Max-Kade, 1983-1984; researcher, Max-Planck Institute, since 1985.
Member European Society for Chronobiology, European Association for Study of Obesity, German Apipositas Society (Research award 1996).