A new study casts doubt on the universe’s accelerating expansion, suggesting dark energy might be weakening over time.

Research published Tuesday by a Japanese astrophysicist says gamma rays may have been generated by the collision of dark ...

Let's rewind the clock back…oh, I don't know, let's say a hundred years. It was 1917, and Einstein had just developed his ...

If findings are correct, astronomer Tomonori Totani told Newsweek, this may finally solve "the greatest mystery in cosmology.

The mysterious force called Dark Energy, which helps the Universe to expand, might be changing in a way that challenges our ...

In the early 1930s, Swiss astronomer Fritz Zwicky observed galaxies in space moving faster than their mass should allow, ...

“If this is correct, to the extent of my knowledge, it would mark the first time humanity has ‘seen’ dark matter. And it turns out that dark matter is a new particle not included in the current ...

After accounting for star age at time of explosion, researchers say our universe may be slowing down. In A Nutshell Younger ...

A new study claims to show evidence of gamma-ray emissions that closely resemble those expected from two weakly interacting ...

As if dark energy weren't already mysterious and baffling enough, new research suggests that this unknown force may not be driving galaxies apart at an accelerating rate anymore. This remarkable ...

Scientists may have finally seen dark matter, uncovering a gamma-ray signal that could reveal the universe’s most mysterious ...

Scientists may have "seen" dark matter for the first time, thanks to NASA's Fermi gamma-ray space telescope. If so, this ...