Paul Sutter

The answer to the dark-matter mystery may be under our feet.

We all know that iconic scene: Luke Skywalker staring forlornly — and perhaps wistfully — at the double sunset of his home planet, Tatooine.

String theory is a purported theory of everything that physicists hope will one day explain … everything.

A dark web ties the universe together. Now, we can see it.

As far as we can tell, we're alone. But it could be that we're looking in the wrong places.

It was a big moment for our cosmos when the first stars awoke, but it's an elusive one for scientists.

These supremely stable particles could explain dark matter.

String theory is a powerful idea, unfinished and untested, but one that has persisted for decades despite inauspicious beginnings.

Researchers recently released simulations of the Large Magellanic Cloud — a satellite galaxy of the Milky Way — and found that cosmic rays from a starburst event are starting to rip it apart.

We may soon find out whether we live in an axiverse.

Gamma-ray bursts are even worse than we thought.

Gravitational waves leave behind a memory — a permanent bend in space-time — as they pass through.

A new study has called into question the prevailing notion that the universe is "flat." The stakes of this cosmological debate are huge.

At some point, the rules of the subatomic give way to the rules of the macroscopic. But how? We're not exactly sure, and it's been a long, strange journey in trying to answer that question.

An ambitious new fleet of spacecraft could reveal whether space-time is smooth or chunky, and in doing so the ultimate nature of reality.

You're about to take a dip into the inky blackness of a giant black hole and see what's on the other side of that enigmatic event horizon. What will you find inside? Read on, brave explorer.

A brand-new particle has possibly emerged and is altering the future destiny of our entire cosmos, a physicist says.

Physicists have figured out what's lurking inside of white dwarfs, revealing the stellar corpses are creamy and filled with exotic quantum liquids.

The 1995 discovery showed that the sun isn't the only star to host a family of planets — something we had long figured but never demonstrated — and also that the universe is really, really weird.

Physicists are scouring the universe for evidence that one of the fundamental constants of nature, Newton's gravity, is not constant at all.

Obviously, some chain of unfortunate events led to the ejection of 'Oumuamua from its home system. But what could possibly cause such a catastrophe?

Physicists have proposed that a trio of particles called Higgs bosons could be responsible for the mysterious vanishing act of antimatter in the universe.

Interstellar flight is a real pain in the neck.

The two giant blobs remain mysterious, nearly a decade after their discovery.

There are some odd little particles out there that are bound by the strong nuclear force, but physicists can barely get a glimpse of them before they flit out of existence.