We are facing the greatest cosmological puzzle of modern times: the James Webb telescope found the first real evidence to shake our cosmology! Was everything we thought we knew about the Big Bang and the formation of the first stars really wrong? It is too late for old explanations. We are at the beginning of a completely new era of cosmology. One of the largest computer simulations the world of science has ever seen has revealed astonishing things about the young universe. But can this experiment really explain everything that the James Webb Telescope shows us?