Physics

Ripples in space-time have been detected a century after Einstein predicted them, launching a new era in astronomy.

Searching for signs of life on faraway planets, astrobiologists must decide which telltale biosignature gases to target.

The physicist Subir Sachdev borrows tools from string theory to understand the puzzling behavior of high-temperature superconductors.

Bizarre quantum bonds connect distinct moments in time, suggesting that quantum links — not space-time — constitute the fundamental structure of the universe.

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

The irreversibility of time may be a clue as to what makes up the universe’s dark matter.

If a theory can’t be tested, is it still science?

Three computer scientists have solved a problem central to a dozen far-flung mathematical fields.

The physical nature of computers might reveal deep truths about their uniquely powerful abstract abilities.