extra dimensions
The idea that spacetime has more than the familiar three dimensions, with consequences for particles and forces.
Articles about extra dimensions
Five Dimensions Are a Mathematical Necessity
String Theory Just Forced Its Way Back Into the Room
Our universe is a black hole's leftover
Particles Detected in Another Dimension
Is Dark Matter Real? Gravity's New Contender
Wormholes: From Math to Stranger Things
Hints of a New Particle Beyond the Standard Model