GRAVITY Universe Time Clock uses magnetic levitation to create an illusion of time orbiting like a planet in space.

Quantum theory and Einstein's theory of general relativity are two of the greatest successes in modern physics. Each works ...

Quantum mechanics and relativity are the two pillars of modern physics. However, for over a century, their treatment of space ...

China has eclipsed its own – and the US – record, building a monster underground hypergravity centrifuge that can model ...

Einstein’s claim that the speed of light is constant has survived more than a century of scrutiny—but scientists are still ...

In 2026, there will be journeys to the moon and Mars, new visions of the cosmos and a solar eclipse that might be worth ...

So, to create a must-read story list for you, we asked our staff to select their favorite pieces of 2025. Alas, while you're ...

Astronomers have directly observed a spinning black hole twisting spacetime, confirming a century-old prediction of ...

Six hundred miles above Earth, four near-perfect gyroscopes spun in superfluid helium to chase a prediction most thought was unmeasurable. This is the story of Gravity Probe B, the decades of ...

China has quietly switched on a machine that can subject objects to gravity up to 1,900 times stronger than what we feel at ...

I have a form of time–space synesthesia, so the new year arrives for me in a very physical way. I feel myself move around the ...

Scientists measured mass and distance of free floating planet drifting through space without star for first time.