The universe comes with a built‑in speed cap, a hard limit that shapes everything from how stars shine to how cause and ...

A new theory suggests gravity could possibly be the result of entropy—which would mean everything in the universe would fall ...

Gravity is supposed to be the most familiar force in nature, yet at the deepest level it remains the least understood. A bold ...

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

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

The geometry of spacetime forms the very foundation of modern gravitational theory, where the elegant interplay between curvature and matter is described by Einstein’s field equations. In this ...

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 ...

I've been trying to explain quantum physics, forces, relativity, and space-time to my kid and we had a question that I'm finding difficult to find a solid answer to. Background you can skip if you ...

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 ...

"So far we have been watching the cosmos like a silent movie, capturing the ripples of spacetime with LISA will be a real game-changer, like when sound was added to motion pictures." When you purchase ...