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Neutrons can be stable when bound into an atomic nucleus, but free neutrons decay away in mere minutes. So how are neutron stars stable?

Perhaps the whole Universe is the result of a vacuum fluctuation, originating from what we could call quantum nothingness. 

Just 13.8 billion years after the hot Big Bang, we can see objects up to 46.1 billion light-years away. No, this doesn’t violate relativity.

If light can’t be bent by electric or magnetic fields (and it can’t), then how do the Zeeman and Stark effects split atomic energy levels?

Researchers at the Brookhaven National Laboratory recently created the heaviest exotic antimatter hypernucleus ever observed.

In general relativity, white holes are just as mathematically plausible as black holes. Black holes are real; what about white holes?

Today, the Large Hadron Collider is the most powerful particle physics experiment in history. What would a new, successor collider teach us?

The brightest gamma-ray burst ever observed, GRB 221009A behaved in unexpected ways that might help us understand how they occur.

From the explosions themselves to their unique and vibrant colors, the fireworks displays we adore require quantum physics.

The future belongs to complexity.

Innovative thinking has done away with problems that long dogged the electric devices — and both scientists and environmentalists are excited about the possibilities.

NASA’s only flagship X-ray telescope ever, Chandra, still works and has no planned successor. So why does the President want to kill it?

From how life emerged on Earth to why we dream, these unanswered questions continue to perplex scientists.

To know how to protect its astronauts, NASA needs to first understand the threat.

Practically all of the matter we see and interact with is made of atoms, which are mostly empty space. Then why is reality so… solid?

Are quantum fields real, or are they simply calculational tools? These 3 experiments show that if energy is real, so are quantum fields.

Nothing can escape from a black hole. So where do Hawking radiation, relativistic jets, and X-ray emissions around black holes come from?

We are about to learn a lot more about the most elusive of cosmic particles.

As we pursue the leadership difference we seek, we attract fuel and generate heat. The trick is to avoid burnout.

It was a particularly good year for biotech and medical technology. There were also notable advances in energy.

The “first cause” problem may forever remain unsolved, as it doesn’t fit with the way we do science.

In the quest to measure how antimatter falls, the possibility that it fell “up” provided hope for warp drive. Here’s how it all fell apart.

Earth, the only rocky planet with a large, massive satellite, is greatly affected by the Moon. Destroying it would cause 7 major changes.

The properties of a ghostly particle called a neutrino are coming into focus.

Two fundamentally different ways of measuring the expanding Universe disagree. What’s the root cause of this Hubble tension?

You can only create or destroy matter by creating or destroying equal amounts of antimatter. So how did we become a matter-rich Universe?

A great many cosmic puzzles still remain unsolved. By embracing a broad and varied approach, particle physics heads toward a bright future.

Plants at room temperature show properties we had only seen near absolute zero.

The Big Bang’s hot glow faded away after only a few million years, leaving the Universe dark until the first stars formed. Oh, the changes!

Is the Universe finite or infinite? Does it go on forever or loop back on itself? Here’s what would happen if you traveled forever.