The consequences for society of the growing proportion of elderly people require an interdisciplinary approach. The symposium was aimed at exploring the implications and the limits of scientific research concerning the prolongation of individual life spans and the preservation of the quality of life in advanced age. The following subjects were discussed in separate sessions by a group including medical practitioners and researchers, natural scientists, psychologists and sociologists, theologians and specialists in general and medical ethics: 1. The concept of age and the intentions of research on aging; 2. Aging and the brain, chances for protective therapy; 3. Psychological and sociological aspects of aging; 4. Quantitative methods and opt...