Astronomers have long been puzzled by a missing piece of the universe. While we are familiar with the ordinary matter that ...

This week, a Cretaceous-era trackway in Canada provides the first evidence of a dinosaur herd combining two species, ...

Decades ago, astronomers estimated that “ordinary” matter (basically everything that isn’t dark matter or dark energy) makes up 5% of the universe. There was just one problem—they had no idea where ...

Two studies fill in gaps about the cosmos’s ordinary matter. One maps it all, even the “missing matter.” The other details one of its hiding spots.

The Big Bang made matter and antimatter in equal measure, so where did all the antimatter go? This cosmic imbalance may hold ...

In a first, CERN physicists succeeded in observing matter-antimatter imbalance in baryons, fundamental particles that make up ...

"One day soon we may be able to see these 'missing' galaxies, which would be hugely exciting and could tell us more about how ...

There could be many more satellite galaxies orbiting the Milky Way than previously thought or observed, according to ...

Cosmology is currently in a crisis known as the Hubble tension: the local universe appears to be expanding about 10% faster ...

Current models of physics dictate there should be as much antimatter in the universe as matter, but there isn't. Work at the ...

The Milky Way could have many more satellite galaxies than scientists have previously been able to predict or observe, ...

CNN quotes William H. Kinney in an article about how astronomers are using mysterious fast radio bursts, or millisecond-long bright flashes of radio waves from space, to help them track down some of ...