Physicists propose that a mysterious force known as early dark energy could solve two of the biggest puzzles in cosmology and fill in some major gaps in our understanding of how the early universe ...

As cosmology has become more precise, additional tensions have arisen between predicted and measured values of these parameters, leading to a profusion of theoretical extensions to the standard model.

However, one competing theory known as “timescape cosmology” suggests that many observations can be explained by differences in how time flows between dense regions of the universe (such as ...

For instance, the standard model of cosmology — our leading theory of cosmic evolution — does suggest dark energy is unwavering across the universe and throughout time, making it a fundamental ...

A year of data from DESI, the Dark Energy Spectroscopic Instrument, suggests that, contrary to expectations, dark energy might vary over time.

The discovery of dark energy in the 1990s was a surprise, because the expectation in cosmology had been that the gravity of all the matter in the universe would slow down the expansion discovered ...

Mysterious little red dots threatened to overhaul modern cosmology—but new research may have solved the celestial conundrum.

Out of its past troubles, the model may emerge not only vindicated, but also strengthened, and cosmology will be a science that is both precise and accurate.