Why does space look dark if the universe is full of stars? This was the question asked by Heinrich Wilhelm Olbers in 1823.

We can't see dark matter directly, so studying it pushes the boundaries of our creativity as scientists. How exciting, says ...

Physicists have determined that most of the universe is dark matter -- invisible to us but affecting the universe anyway.

Of all the sciences, physics is unique in that it can come to a broad consensus with math alone—very little tactile evidence required. Never has this been the case more than with dark matter. Though ...

Not much has been uncovered about dark matter, the mysterious, invisible element that comprises around 25 per cent of the ...

The vast majority of matter is dark – invisible until it is detected only through its gravitational effects. The newly discovered object could be a clump of dark matter, or it could also be a compact, ...

"It would be amazing if a simple rotation of the universe was the origin of dark energy." What is dark energy? Why does dark energy seem to be weakening? Is our universe part of a larger multiverse?

Dark energy—the term used to describe whatever is causing the universe to expand at an increasing rate—is one of the universe’s greatest mysteries. The most widely accepted theory currently suggests ...

"There are more questions than answers at this point." Dark energy could have an accomplice that helps it slow the growth of large cosmic structures, such as vast superclusters made up of clusters of ...

Dr. Richard Lieu, a physics professor at The University of Alabama in Huntsville (UAH), a part of The University of Alabama System, has published a paper in the journal Classical and Quantum Gravity ...