It was very interesting to assist at 3Rs simposium promoted by CUIMP and coordinated by Dr. M.Pilar Vinardell (University of Barcelona) in collaboration with REMA (the Spanish network for the development of non-animal alternative methods). Last Monday 26th and Tuesday 27th of November, several experts provided a great update on 3Rs regulation, tools and development of new non-animal alternatives for toxicology, education, basic and applied research. During the first afternoon