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Optics & Photonics Sep 24, 2025

100 years before quantum mechanics, one scientist glimpsed a link between light and matter

The Irish mathematician and physicist William Rowan Hamilton, who was born 220 years ago last month, is famous for carving some mathematical graffiti into Dublin's Broome Bridge in 1843.

Astronomy Sep 16, 2025

Astronomers discover rare Einstein cross with a fifth image, revealing hidden dark matter

When Rutgers theoretical astrophysicist Charles Keeton first saw an unusual picture shared by his colleague, he was intrigued.

Astronomy Sep 15, 2025

Is dark energy evolving? Astrophysicists consider the possibilities

Dark energy—the term used to describe whatever is causing the universe to expand at an increasing rate—is one of the universe's greatest mysteries. The most widely accepted theory currently suggests that dark energy is constant, ...

General Physics Sep 10, 2025

Ringing black hole confirms Einstein and Hawking's predictions

A decade ago, scientists first detected ripples in the fabric of space-time, called gravitational waves, from the collision of two black holes. Now, thanks to improved technology and a bit of luck, a newly detected black ...

General Physics Sep 8, 2025

Physicists devise an idea for lasers that shoot beams of neutrinos

At any given moment, trillions of particles called neutrinos are streaming through our bodies and every material in our surroundings, without noticeable effect. Smaller than electrons and lighter than protons, these ghostly ...

Quantum Physics Sep 8, 2025

What is a quantum computer's speed limit? Entanglement can provide an answer

Since the 1990s, evidence has been growing that quantum computers should be able to solve a range of particularly complex computational problems, with applications in everything from supply chain management to medicine and ...

Astronomy Aug 28, 2025

A new theory of the universe's origins without inflation

How exactly did the universe start and how did these processes determine its formation and evolution? This is what a study published in Physical Review Research hopes to address as a team of researchers from Spain and Italy ...

Astronomy Aug 21, 2025

What happened before the Big Bang? Computational method may provide answers

We're often told it is "unscientific" or "meaningless" to ask what happened before the Big Bang. But a new paper by FQxI cosmologist Eugene Lim, of King's College London, UK, and astrophysicists Katy Clough, of Queen Mary ...

Astronomy Aug 20, 2025

The most powerful tool in an astronomer's arsenal is a lens—but not the kind you might think

Astronomers are living in a golden age of bigger and better telescopes. But even our most advanced technology pales in comparison to the power of nature's own "cosmic magnifying glasses"—strong gravitational lenses.

Astronomy Aug 19, 2025

Fast X-ray transients shine light on how stars end their lives and the distant universe

A new kind of stellar explosion provides a novel way to probe the distant universe, according to new results published today in Nature Astronomy.

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