Not everything we knew about the universe is wrong. But not not everything. The Dark Energy Spectroscopic Instrument (DESI) ...

The great Russian physicist and Nobel laureate Lev Landau once remarked that "cosmologists are often in error, but never in ...

The model has generally assumed that dark energy is an inherent property of empty space that does not change over time — a ‘cosmological constant’. “The gauntlet has been thrown down to ...

Perlmutter, Riess, and Schmidt attributed this deviation to Einstein’s cosmological constant, which is represented by the Greek letter Lambda, Λ, and is related to the deceleration parameter.

The first results from the Dark Energy Spectroscopic Instrument (DESI) are a cosmological bombshell, suggesting that the strength of dark energy has not remained constant throughout history. Instead, ...

If validated, this would imply that dark energy, the cosmological constant, is not constant after all, but a dynamic phenomenon requiring a new theoretical framework. "This result is intriguing ...

Researchers see hints that dark energy, widely thought to be a "cosmological constant," might be evolving over time in unexpected ways. "What we are seeing is deeply intriguing," said Alexie ...

Ever since, it's been thought of as a constant, immutable presence. Now, the latest observations from the Dark Energy Spectroscopic Instrument (DESI) indicate that dark energy has actually changed ...