On November 12, 2025, a ripple passed through the fabric of spacetime and triggered alarms at three gravitational-wave ...

In 1916, only a year after Albert Einstein had published his general theory of relativity, Karl Schwarzschild used mathematical calculations to show this: If sufficient mass could be placed into an ...

On Wednesday, researchers released an analysis suggesting that there’s a “mass gap” in the population of black holes that ...

It may well take years to prove, but a pair of University of Miami astrophysicists could be on the verge of a cosmic ...

The gravitational wave signal, captured byLIGO in November 2025, has sparked a revolutionary hypothesis: the collision that produced the signal might not have involved conventional stellar black holes ...

A gravitational wave signal recorded by the LIGO, Virgo, and KAGRA detectors on November 12, 2025, has drawn intense ...

The following is an extract from our Lost in Space-Time newsletter. Each month, we hand over the keyboard to a physicist or mathematician to tell you about fascinating ideas from their corner of the ...

Some things in cosmology may simply be unknowable. Why is there something rather than nothing? What lies outside the universe? What is inside a black hole? That last one has been niggling at ...

Centuries before anyone pointed a telescope at the sky, Isaac Newton figured out how gravity works. He showed that any object with mass pulls on every other object—a result that explained falling ...

This artist's concept takes a fanciful approach to imagining small primordial black holes. In reality, such tiny black holes would have a difficult time forming the accretion disks that make them ...

In 2023, a subatomic particle called a neutrino crashed into Earth with such a high amount of energy that it should have been impossible. In fact, there are no known sources anywhere in the universe ...