Recommendable perspective/overview article on dark energy and latest findings!
"... Then, last year, the Dark Energy Spectroscopic Instrument [DESI] uncovered a hint that all is not what it seems. ...
DESI was able to stitch together a flip-book of snapshots from the early universe until now. They then combined that data with studies of supernovae from another survey, the Dark Energy Survey. And what they found was that for the past few billion years or so, dark energy seems to have been weakening over time.
Scientists were skeptical of the 2024 result; it would take compelling evidence to upend their decades-old paradigm of the cosmos. But on March 19 [2025], DESI’s team presented new results at the Global Physics Summit in Anaheim, California. One year and nine million more galaxies after their earlier announcement, the hypothesis that DESI is seeing a change in dark energy carries more weight than ever before. ..."
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