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 ...

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

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

Scientists propose a new gravity theory using Friedmann equations. Their model explains the universe’s accelerating expansion ...

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

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

Why the universe is expanding faster and faster remains one of the biggest open questions in physics. Current theories cannot ...

Dark matter, the invisible substance that shapes the Universe, may have had a far more dramatic beginning than scientists once believed.

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

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

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 ...