The Case of the Missing Matter "We robustly show that the gas is much more extended than the dark matter" relative to ...

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

Half of the universe's hydrogen has been missing since the Big Bang 13.8 billion years ago, but scientists reckon they've ...

For decades, scientists have known that ordinary matter — everything made of atoms — accounts for just 15% of the universe’s matter. The rest is mysterious dark matter. But even that modest slice didn ...

Astronomers may have uncovered a hidden population of galaxies that could rewrite what we know about the universe's evolution ...