Two fresh ideas are giving scientists new ways to think about how the universe’s hidden mass came to be. Together, they paint ...

With few clues to go on, we don't know what it is; we only know of its existence because somehow, the effects of gravity ...

Bold new theories on "mirror worlds" and how dark matter may have formed - from black hole relics to quantum horizons.

Two recent studies by Professor Stefano Profumo at the University of California, Santa Cruz, propose theories that attempt to ...

In the first one, Profumo focuses on the possibility of dark matter as a consequence of the expansion of the universe. The ...

We usually think of satellites as small objects orbiting planets or stars. But in the broader universe, galaxies themselves ...

For more than half a century, scientists have tried to understand dark matter—a mysterious form of matter that doesn’t emit ...

Researchers are developing a thorium-229 nuclear clock so sensitive it could detect the faint, wave-like effects of dark matter, potentially solving one of physics’ greatest mysteries.

Most of what we know about satellite galaxies comes from studying the Milky Way and other similarly large galaxies. But a new ...

Physicists detect antihydrogen-4, the heaviest antimatter nucleus ever created, fueling new theories about dark matter and ...

Aug. 1 is Women Astronomers Day, highlighting the historical achievements of women in astronomy. The designation honors the ...