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# Gravity

## Latest Articles

### A New Cosmic Tension: The Universe Might Be Too Thin

Cosmologists have concluded that the universe doesn’t appear to clump as much as it should. Could both of cosmology’s big puzzles share a single fix?

### The Physicist Who Slayed Gravity’s Ghosts

Claudia de Rham showed how theories of “massive gravity” could potentially get rid of the need for dark energy.

### How the Bits of Quantum Gravity Can Buzz

New calculations show how hypothetical particles called gravitons would give rise to a special kind of noise.

### Why Gravity Is Not Like the Other Forces

We asked four physicists why gravity stands out among the forces of nature. We got four different answers.

### Black Hole Paradoxes Reveal a Fundamental Link Between Energy and Order

By chewing on the problems posed by “extremal” black holes, physicists have exposed a surprising and universal connection between energy and entropy.

### New Math Proves That a Special Kind of Space-Time Is Unstable

Einstein’s equations describe three canonical configurations of space-time. Now one of these three — important in the study of quantum gravity — has been shown to be inherently unstable.

### Black Hole Singularities Are as Inescapable as Expected

For the first time, physicists have calculated exactly what kind of singularity lies at the center of a realistic black hole.

### The Simple Idea Behind Einstein’s Greatest Discoveries

Lurking behind Einstein’s theory of gravity and our modern understanding of particle physics is the deceptively simple idea of symmetry. But physicists are beginning to question whether focusing on symmetry is still as productive as it once was.

### How Space and Time Could Be a Quantum Error-Correcting Code

The same codes needed to thwart errors in quantum computers may also give the fabric of space-time its intrinsic robustness.