In this interview with the German initiative "Tierversuche verstehen" (en: understanding animal research), Prof. May-Britt Moser, Norwegian Nobel Laureate in Medicine/Physiology in 2014, speaks about the necessity of happy lab-animals in research and animal testing. "It is extremely important that humans give the best care possible to their lab-animals. This way, we get the best results", May-Britt Moser emphasizes.