A new analysis of data collected over three years by the Dark Energy Spectroscopic Instrument (DESI) collaboration provides even stronger evidence than the group’s previous datasets that dark energy, long thought to be a “cosmological constant,” might be evolving over time in unexpected ways. Although it is not well understood, dark energy is thought by many scientists to play a key role in the observed accelerated expansion of the universe. However, different combinations of DESI data mixed with the CMB, supernovae and weak lensing measurements set the range from 2.8 sigma to 4.2 sigma. “In this new analysis, not only have we confirmed our previous findings that dark energy is likely evolving over time, but we are increasing their significance. DESI is also supported by the National Energy Research Scientific Computing Center, a DOE Office of Science national user facility.