The James Webb Space Telescope found a galaxy exactly like our Milky Way, and this galaxy existed only 1.9 billion years after the Big Bang. This is a scientific puzzle, because a galaxy of this age should be a chaotic and unstructured cluster of stars. This discovery raises fundamental questions about the history of the origin of the universe and the evolution of galaxies. It forces us to rethink our theories about galactic evolution and the timescale of cosmic structure formation. How could such a complex and mature galaxy form in a time that, according to current cosmological models, hardly offers enough space for such developments?