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atomic clock

Physics

Atomic clocks make best measurement yet of relativity of time

Einstein's relativity has survived another test, carried out using a network of synchronised atomic clocks in three European cities

string artwork

Physics

The string-loop theory that might finally untangle the universe

The LIGO detector site in Livingston, Louisiana

Physics

Gravitational wave detector prepares to peer into bizarre stars

A crystal

Physics

World鈥檚 first time crystals cooked up using new recipe

Physics

Plasma tidal wave may tell us if black holes destroy information

Technology

Light-speed camera snaps light’s “sonic boom” for the first time

Galaxy cluster with lensing effects

Physics

First test of rival to Einstein’s gravity kills off dark matter

Colourful lines of light against a black background skirt around a marble

Physics

Gravity may have chased light in the early universe

double-slit experiment

Physics

Classic quantum experiment could conceal theory of everything

balancing pencil

Physics

The universe is flat as a pancake, and we don’t understand why

Dark energy is smoothing the expanding cosmic curves 鈥� but only exactly the right amount can make that happen

Physics

Reality guide: Six problems physics can’t explain

Physics

Reality guide: The essential laws of cosmology

Physics

Reality guide: The essential laws of quantum physics

Physics

Reality guide: Six radical ideas to change physics