At the Japanese Research Center for Particle Physics KEK, the new particle accelerator experiment Belle II started operation after eight years of construction. Scientists from all over the world eagerly waited for news on the first collisions. 20 researchers of Karlsruhe Institute of Technology (KIT) are involved in the experiment. Based on the Belle II data, they want to study the events after the big bang and to find out the secret of dark matter. Yesterday evening at 5.23 pm German time, first data were measured.