Wormholes are often imagined as tunnels through space or time—shortcuts across the universe. But this image rests on a ...

Physicists have long treated space and time as the stage on which quantum particles perform, not as actors in the drama ...

Our universe plays by certain rules, which originate from different branches of physics. But sometimes the rules seem ...

Astronomers have seen spacetime itself wobble near a spinning black hole for the first time. The discovery, revealed during a star’s destruction, confirms a major prediction of Einstein’s theory of ...

The accelerating expansion of the universe is usually explained by an invisible force known as dark energy. But a new study ...

Quantum mechanics and relativity are the two pillars of modern physics. However, for over a century, their treatment of space ...

Quantum theory and Einstein's theory of general relativity are two of the greatest successes in modern physics. Each works ...

A violent stellar disruption recorded in 2024 has given astronomers their most comprehensive evidence yet of a black hole twisting the very fabric of spacetime around itself. This effect is known as ...

The original version of this story appeared in Quanta Magazine. At the beginning of time and the center of every black hole lies a point of infinite density called a singularity. To explore these ...

Lorentzian geometry forms the mathematical cornerstone of modern spacetime theory by providing a framework in which the causal structure and metric properties of the universe can be rigorously ...