Space-time

Two leading candidates for a “theory of everything,” long thought to be incompatible, may be two sides of the same coin.

Nima Arkani-Hamed is championing a campaign to build the world’s largest particle collider, even as he pursues a new vision of the laws of nature.

Explore the deepest mysteries at the frontier of fundamental physics, and the most promising ideas put forth to solve them.

Imagine the fabric of space-time peeled back layer by layer.

New tools may reveal how quantum information builds the structure of space.

A bold new idea aims to link two famously discordant descriptions of nature. In doing so, it may also reveal how space-time owes its existence to the spooky connections of quantum information.

If string theorists can show that their framework is the only consistent theory of quantum gravity, does that make it true even without tangible evidence?

New calculations suggest physicists may someday discover a fundamental theory of gravity, but it could require a radical new perspective on the universe.

Physicists have devised experiments that can probe the interface between quantum mechanics and general relativity.