Visual comparison of a small region in the simulations (left: standard model of cosmology; right: dynamical dark energy model). The differences are subtle but still clearly visible at the substructure level. (Image by the ALCF Visualization and Data Analytics Team and the HACC Collaboration.)

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   Fraser Cain (fraser@m.universetoday.com)'s status on Thursday, 20-Mar-2025 07:04:10 JST Fraser Cain

   Evidence is growing that dark energy's influence on the expansion rate of the universe has been changing over time. A range of space and ground-based observatories are coming online to measure the expansion rate across the universe's history, but a supercomputer has crunched the data and found similar results. Researchers compared two large-scale simulations of the universe, one with constant dark energy and one where it varies, and that better matched the observations.

   https://www.anl.gov/article/argonne-team-uses-aurora-supercomputer-to-investigate-potential-dark-energy-breakthrough#:~:text=While%20scientists%20continue%20to%20validate,Global%20Physics%20Summit%20this%20week.