For the next 25 years, most assumed this force was constant ... group that analyzed the DESI data. The idea that dark energy might be changing over time is more than a provocative twist; it ...

Like me, a few cosmologists have become distracted by other problems over ... the data alone is still consistent with a ...

But there are some tantalizing hints that it could vary over time ... data in 1929. Prior to this, Einstein had been trying to modify general relativity by adding a cosmological constant to ...