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

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

Dark matter makes up a large portion of the universe, but we've never seen it. Here's what we know, what it might be, and why it could change everything.

NASA's James Webb Space Telescope recently zeroed in on the Bullet Cluster—delivering highly detailed images that show a ...

A universe without dark matter would require striking modifications to the laws of gravity as we ­currently understand them, which are based on Einstein’s general theory of relativity. Updating ...

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

On the fifth anniversary of the height of the Black Lives Matter protests, the events had an unreal, phantasmagoric quality.

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