Is Dark Energy Getting Weaker? New Evidence Strengthens the Case. https://www.quantamagazine.org/is-dark-energy-getting-weaker-new-evidence-strengthens-the-case-20250319/

Last spring, a team of nearly 1,000 cosmologists announced that dark energy — the enigmatic agent propelling the universe to swell in size at an ever-increasing rate — might be slackening.
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Combining that data with state-of-the-art observations of the cosmic microwave background, they found a tension with Lambda-CDM of 3.2 sigma that disappears when dark energy is presumed to change.
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Varying dark energy would vastly expand the range of possibilities for where the universe is headed. The expansion might grind to a halt, and gravity could bring everything crashing together. Or dark energy could go phantom again, and the expanding universe could even pick up more speed. Everything depends on the details of what’s generating this energy.