In an extraordinary feat of cosmic exploration, astronomers are embarking on a five-year journey to create the most extensive 3D map of the cosmos ever conceived. The Dark Energy Spectroscopic Instrument (DESI) is at the forefront of this endeavor, and its initial findings are already reshaping our understanding of the universe. Measuring the universe's expansion with dark energy Using spectra from nearby galaxies and distant quasars, astronomers from the DESI collaboration have measured the expansion history of the universe with unparalleled precision. By analyzing the survey's first-year...