For a quarter century, cosmology has rested on a simple but audacious idea: that a fixed “cosmological constant” drives the ...

The accelerating expansion of the universe is usually explained by an invisible force known as dark energy. But a new study ...

Researchers in Germany argue that a modified theory of gravity could explain universal expansion, removing dark energy from ...

The Hubble tension just got tenser — with new measurements revealing that the universe is expanding faster than our current ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. A photograph of the Atacama Cosmology Telescope in Chile overlaid with a figure from its final ...

Scientists are a step closer to solving one of the universe's biggest mysteries as new research finds evidence that two of ...

As the youthful universe congealed under the pull of gravity, matter knotted itself into galaxies, galaxy clusters and filaments, weaving a dazzlingly intricate cosmic web. This web’s structure is ...

An expert shares his personal reminiscences of the evolution of the subject of cosmology over six decades. He tells of the increase in our confidence in the standard model of cosmology to the extent ...

Astronomers have been confounded by recent evidence that the universe expanded at different rates throughout its life. New findings risk turning the tension into a crisis, scientists say. When you ...