Does dark energy wobble? New data pushes back against a flat universe

Using CMB, DESI DR2, and supernova data together, this analysis tests whether dark energy deviates from a simple cosmological constant by adding a quadratic time-dependence. The model nudges the inferred Hubble constant higher, easing some tension with local distance-ladder measurements, and Bayesian evidence consistently favors it over standard ΛCDM. With DESI data accumulating rapidly, frameworks like this will face increasingly sharp tests.