Overview

• Physical Review Letters published the study, titled “Novel Approach to Cosmological Nonlinearities as an Effective Fluid,” on August 15, 2025.
• The approach treats nonlinear cosmic structure as an effective fluid to compute its impact on measurements without invoking new physics, according to the authors.
• Using DESI and other independent datasets, the team identified minimum influential scales R_v for voids and R_c for clusters that can alter cosmological inference.
• Dataset contours overlapped in a region indicating large voids may underlie observed anomalies, and the authors highlight a plotted green box where their model resolves the Hubble tension.
• The authors also argue the framework can account for apparent dynamical dark energy signals, a claim that now requires reproduction and further observational tests.