Physicists are waging a cosmic battle over the character of darkish vitality

Is darkish vitality altering, or is it simply extra of the identical? Final month, astronomers introduced the startling discovering that darkish vitality – which is assumed to trigger the accelerating enlargement of the universe – may weaken over time. This has pressured physicists to think about upending the usual cosmological mannequin of the universe however now, some researchers are saying this can be untimely.

Because it began scanning the sky in 2021, the Darkish Vitality Spectroscopic Instrument (DESI) in Arizona has been fastidiously measuring the distances between tens of millions of…