For nearly a century, scientists around the world have been searching for dark matter—an invisible substance believed to make ...

How do you weigh one of the largest objects in the entire universe? Very carefully, according to new research.

Dark matter is one of nature's most confounding mysteries. It keeps particle physicists up at night and cosmologists glued to ...

How is matter different from mass? These and other questions about the deepest levels of physics, answered inside.

Researchers may have found our galaxy's missing companions, further bolstering science's most widely accepted cosmological ...

NASA's James Webb Space Telescope (JWST) has produced a new image of the Bullet Cluster, which is a titanic collision between ...

But axions were pushed aside as the WIMPs hypothesis gained more steam. Back-of-the-envelope calculations showed that the ...

Four people were killed and 14 others wounded in a "deplorable and cowardly" mass shooting in Chicago on Wednesday night, ...

Seen as a long strand with smaller threads branching, the Quipu superstructure contains 68 galaxy clusters spanning 1.4 billion light years.

How is matter different from mass? These and other questions about the deepest levels of physics, answered inside.