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26 March 2024, Baden-Württemberg, Stuttgart: Petra Olschowski (Alliance 90/The Greens), Minister of Science of Baden-Württemberg, looks at a tissue section of a tumor through a multiphoton microscope during a visit to the University of Stuttgart. According to the Baden-Württemberg Ministry of Science, it has been possible to further reduce the number of animal experiments in recent years, not least thanks to the success of alternative research. The so-called 3R network, which aims to avoid, reduce or improve animal testing, has played a major role in this reduction Photo: Marijan Murat/dpa (KEYSTONE/DPA/Marijan Murat)