Scientists may have finally found the universe’s missing matter - hidden in invisible hydrogen gas far beyond galaxies.

Mysterious dark matter makes up 85 percent of matter in the universe, and of the remaining 15 percent, scientists couldn’t ...

Intriguingly, ultralight dark matter might be able to turn into photons (light) — and it's through this process that the ...

Astronomers have long struggled with a troubling puzzle: a significant portion of normal matter in the universe appeared to ...

Astronomers may have found the long-missing half of the universe's regular matter—and it appears to have been right under our ...

A blob of gas seen outside the Milky Way could be a type of starless, dark matter–dominated galaxy. Some scientists are skeptical.

Air pollution levels keep getting worse for more people in the US, according to a new report, and experts say the Trump ...

"All the odd shapes and swirling gas observed in the Perseus cluster now make sense within the context of a major merger." ...

A team of astronomers and astrophysicists at the Chinese Academy of Science's National Astronomical Observatories has found ...

President Donald Trump's energy security council plans to host a summit in Alaska in early June, when it hopes Japanese and ...