Dark energy may be the most mysterious substance ever proposed, but many scientists are certain it exists. Why?

Our best models of the cosmos don't add up — but that could change if the universe is actually made of a viscous 'fluid,' a ...

In an unprecedented step, researchers crafted a detailed model compatible with the universe’s accelerated expansion.

The rapid acceleration of the universe’s expansion continues to challenge our understanding of fundamental physics. Why the ...

When it comes to understanding the universe, what we know is only a sliver of the whole picture.

At Texas A&M University, experimental particle physicist Dr. Rupak Mahapatra spends his days chasing some of the faintest ...

Studies suggest that the universe's expansion is decelerating — but what could that mean for the future of the cosmos?

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

The Standard Model of our universe doesn’t match the evidence, in part because of dark energy, a ghostly force pushing the ...

Last year, we reported on an exciting hint of new physics in the first data analysis results from the Dark Energy Spectroscopic Instrument (DESI)—namely that the dark energy, rather than being ...

Dark energy is one of the most mysterious features of our universe – we don’t know what it is, but it controls how the universe is expanding, as well as its ultimate fate. Now, a study of millions of ...

Physicists have unveiled a new way to simulate a mysterious form of dark matter that can collide with itself but not with ...