The neutrino “fog” is beginning to materialize. Lightweight subatomic particles called neutrinos have begun elbowing their way into the data of experiments not designed to spot them. Two experiments, ...

A new experiment with momentum-entangled helium atoms could help unite quantum mechanics and general relativity.

Dark matter is some kind of substance that has gravity—it holds galaxies together—yet cannot be directly seen with any ...

A ghost is haunting our universe. This has been known in astronomy and cosmology for decades. Observations suggest that about 85% of all the matter in the universe is mysterious and invisible. These ...

One of the great mysteries of modern science is dark matter. We know dark matter exists thanks to its effects on other objects in the cosmos, but we have never been able to directly see it. And it s ...

Dark matter is claimed to make up over 80% of all matter in the universe, but scientists have never seen it. We only assume it exists because, without it, the behavior of stars, planets and galaxies ...

The nature of dark matter is one of the leading mysteries in modern astronomy. In fact, the name "dark matter" is essentially a placeholder for something astronomers know is there but can't yet ...

A ghost is haunting our universe. This has been known in astronomy and cosmology for decades. Observations suggest that about 85 percent of all the matter in the universe is mysterious and invisible.