Once considered an oddity of quantum physics, time crystals could be a good building block for accurate clocks and sensors, ...

It’s unclear whether science as a discipline—and scientists as people—will ever be able to answer some questions definitively ...

Gravity used to be the most dependable rule in the cosmic rulebook, the quiet background force that never changed its mind. Now a series of discoveries and bold claims are turning that certainty into ...

The “Theory of Everything” is the dream of physics — one framework that connects gravity, quantum mechanics, space, time, and ...

A newly detected gravitational wave, GW250114, is giving scientists their clearest look yet at a black hole collision—and a powerful way to test Einstein’s theory of gravity. Its clarity allowed ...

This puzzle is known as the problem of time, and it remains one of the most persistent obstacles to a unified theory of ...

Long before quantum mechanics existed, a scientist developed a powerful way of describing motion by drawing an analogy between particles and light.

For those who watch gravitational waves roll in from the universe, GW250114 is a big one. It's the clearest gravitational ...

Time feels like the most basic feature of reality. Seconds tick, days pass and everything from planetary motion to human memory seems to unfold along a single, irreversible direction. We are born and ...

An evolution-inspired framework for how quantum fuzziness gives rise to our classical world shows that even imperfect observers can eventually agree on an objective reality ...