The scientists in the Leibniz Association take their responsibility for the welfare of the animals entrusted to them very seriously. Animal experiments are conducted only when unavoidable – when no other methods, e.g. cell culture or computer models, can deliver the required results. Very often, this is for research into human diseases like cancer, HIV, diabetes and malaria, but also research into aging processes, which is necessary for the treatment of diseases like Alzheimer’s and Parkinson’s. Animal experiments are also unavoidable for obtaining a better understanding of higher brain functions. Research on farm animals enables scientists to improve conditions for countless pigs, cows and other animals.