A new map of cosmic expansion suggests that dark energy evolves over time, hinting that the universe doesn’t work the way we ...

Cosmic microwave background data support cosmology’s standard model but retain a mystery about the universe’s expansion rate.

New research by the Atacama Cosmology Telescope (ACT) collaboration has produced the clearest images yet of the universe’s ...

For decades, astronomers have relied on Einstein’s theory of relativity to explain the expansion of the universe, assuming ...